./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl --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 10f0c9018ad5a3307ca17a327503d3e78d6b57daa0dbd1bfcb592e3c4d78b33a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:23:02,708 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:23:02,840 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:23:02,849 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:23:02,850 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:23:02,890 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:23:02,891 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:23:02,891 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:23:02,892 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:23:02,900 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:23:02,902 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:23:02,902 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:23:02,903 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:23:02,905 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:23:02,905 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:23:02,906 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:23:02,906 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:23:02,907 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:23:02,907 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:23:02,907 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:23:02,908 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:23:02,909 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:23:02,909 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:23:02,911 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:23:02,912 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:23:02,913 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:23:02,913 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:23:02,914 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:23:02,914 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:23:02,915 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:23:02,916 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:23:02,916 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:23:02,917 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:23:02,917 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:23:02,917 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:23:02,917 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:23:02,918 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:23:02,918 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:23:02,918 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:23:02,919 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_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f0c9018ad5a3307ca17a327503d3e78d6b57daa0dbd1bfcb592e3c4d78b33a [2023-11-12 02:23:03,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:23:03,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:23:03,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:23:03,255 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:23:03,256 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:23:03,258 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-6.i [2023-11-12 02:23:06,465 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:23:06,754 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:23:06,755 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-6.i [2023-11-12 02:23:06,769 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/data/ec2c00105/14653af361614bfa923159ca7c032a5e/FLAGc6227a60e [2023-11-12 02:23:06,793 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/data/ec2c00105/14653af361614bfa923159ca7c032a5e [2023-11-12 02:23:06,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:23:06,798 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:23:06,799 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:23:06,799 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:23:06,805 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:23:06,806 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:23:06" (1/1) ... [2023-11-12 02:23:06,807 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64b8580a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:06, skipping insertion in model container [2023-11-12 02:23:06,807 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:23:06" (1/1) ... [2023-11-12 02:23:06,879 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:23:07,100 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_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-6.i[915,928] [2023-11-12 02:23:07,317 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:23:07,355 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:23:07,369 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_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-6.i[915,928] [2023-11-12 02:23:07,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:23:07,509 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:23:07,510 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07 WrapperNode [2023-11-12 02:23:07,510 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:23:07,511 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:23:07,512 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:23:07,512 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:23:07,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:07,546 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:07,683 INFO L138 Inliner]: procedures = 26, calls = 71, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 418 [2023-11-12 02:23:07,684 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:23:07,684 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:23:07,685 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:23:07,685 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:23:07,695 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:07,696 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:07,714 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:07,718 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:07,754 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:07,776 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:07,783 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:07,791 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:07,809 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:23:07,810 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:23:07,810 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:23:07,810 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:23:07,819 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:07,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:23:07,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:07,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:23:07,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:23:07,907 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:23:07,908 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:23:07,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:23:07,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:23:07,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:23:07,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:23:08,039 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:23:08,041 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:23:08,905 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:23:08,919 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:23:08,919 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:23:08,922 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:23:08 BoogieIcfgContainer [2023-11-12 02:23:08,923 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:23:08,927 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:23:08,928 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:23:08,931 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:23:08,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:23:06" (1/3) ... [2023-11-12 02:23:08,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e83817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:23:08, skipping insertion in model container [2023-11-12 02:23:08,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (2/3) ... [2023-11-12 02:23:08,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e83817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:23:08, skipping insertion in model container [2023-11-12 02:23:08,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:23:08" (3/3) ... [2023-11-12 02:23:08,935 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-6.i [2023-11-12 02:23:08,954 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:23:08,955 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:23:09,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:23:09,035 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;@37f6e5eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:23:09,036 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:23:09,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 176 states, 115 states have (on average 1.4695652173913043) internal successors, (169), 116 states have internal predecessors, (169), 58 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-12 02:23:09,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-12 02:23:09,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:09,094 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:09,094 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:09,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:09,102 INFO L85 PathProgramCache]: Analyzing trace with hash -2003490361, now seen corresponding path program 1 times [2023-11-12 02:23:09,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:09,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513216712] [2023-11-12 02:23:09,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:09,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:09,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:09,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513216712] [2023-11-12 02:23:09,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:23:09,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547554740] [2023-11-12 02:23:09,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:09,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:09,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:09,597 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:09,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:23:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:09,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:23:10,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 6498 trivial. 0 not checked. [2023-11-12 02:23:10,134 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:10,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547554740] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:10,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:10,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:23:10,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286777705] [2023-11-12 02:23:10,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:10,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:23:10,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:10,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:23:10,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:23:10,198 INFO L87 Difference]: Start difference. First operand has 176 states, 115 states have (on average 1.4695652173913043) internal successors, (169), 116 states have internal predecessors, (169), 58 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) Second operand has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 2 states have call successors, (58) [2023-11-12 02:23:10,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:10,280 INFO L93 Difference]: Finished difference Result 343 states and 618 transitions. [2023-11-12 02:23:10,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:23:10,283 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 2 states have call successors, (58) Word has length 370 [2023-11-12 02:23:10,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:10,296 INFO L225 Difference]: With dead ends: 343 [2023-11-12 02:23:10,297 INFO L226 Difference]: Without dead ends: 170 [2023-11-12 02:23:10,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:23:10,306 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:10,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:23:10,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-12 02:23:10,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2023-11-12 02:23:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 110 states have (on average 1.4181818181818182) internal successors, (156), 110 states have internal predecessors, (156), 58 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-12 02:23:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 272 transitions. [2023-11-12 02:23:10,387 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 272 transitions. Word has length 370 [2023-11-12 02:23:10,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:10,388 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 272 transitions. [2023-11-12 02:23:10,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 2 states have call successors, (58) [2023-11-12 02:23:10,389 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 272 transitions. [2023-11-12 02:23:10,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-12 02:23:10,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:10,398 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:10,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:10,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:23:10,606 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:10,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:10,607 INFO L85 PathProgramCache]: Analyzing trace with hash -956276617, now seen corresponding path program 1 times [2023-11-12 02:23:10,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:10,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670269645] [2023-11-12 02:23:10,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:10,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:10,769 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:10,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099276983] [2023-11-12 02:23:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:10,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:10,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:10,772 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:10,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:23:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:11,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:23:11,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-12 02:23:11,220 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:11,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:11,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670269645] [2023-11-12 02:23:11,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:11,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099276983] [2023-11-12 02:23:11,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099276983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:11,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:11,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:23:11,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742286110] [2023-11-12 02:23:11,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:11,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:11,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:11,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:11,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:23:11,227 INFO L87 Difference]: Start difference. First operand 170 states and 272 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-12 02:23:11,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:11,337 INFO L93 Difference]: Finished difference Result 493 states and 791 transitions. [2023-11-12 02:23:11,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:11,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 370 [2023-11-12 02:23:11,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:11,346 INFO L225 Difference]: With dead ends: 493 [2023-11-12 02:23:11,347 INFO L226 Difference]: Without dead ends: 326 [2023-11-12 02:23:11,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:23:11,350 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 247 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:11,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 560 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:23:11,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-11-12 02:23:11,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 198. [2023-11-12 02:23:11,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 138 states have (on average 1.4565217391304348) internal successors, (201), 138 states have internal predecessors, (201), 58 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-12 02:23:11,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 317 transitions. [2023-11-12 02:23:11,393 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 317 transitions. Word has length 370 [2023-11-12 02:23:11,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:11,396 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 317 transitions. [2023-11-12 02:23:11,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-12 02:23:11,397 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 317 transitions. [2023-11-12 02:23:11,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-12 02:23:11,404 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:11,405 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:11,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:11,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:11,613 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:11,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:11,613 INFO L85 PathProgramCache]: Analyzing trace with hash -815728007, now seen corresponding path program 1 times [2023-11-12 02:23:11,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:11,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376003391] [2023-11-12 02:23:11,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:11,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:11,710 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:11,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342405182] [2023-11-12 02:23:11,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:11,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:11,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:11,723 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:11,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:23:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:12,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:23:12,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 2661 proven. 45 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2023-11-12 02:23:12,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 6441 trivial. 0 not checked. [2023-11-12 02:23:12,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:12,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376003391] [2023-11-12 02:23:12,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:12,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342405182] [2023-11-12 02:23:12,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342405182] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:12,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:23:12,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-12 02:23:12,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414731729] [2023-11-12 02:23:12,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:12,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:23:12,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:12,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:23:12,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:23:12,795 INFO L87 Difference]: Start difference. First operand 198 states and 317 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) [2023-11-12 02:23:13,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:13,689 INFO L93 Difference]: Finished difference Result 544 states and 857 transitions. [2023-11-12 02:23:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:23:13,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) Word has length 370 [2023-11-12 02:23:13,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:13,695 INFO L225 Difference]: With dead ends: 544 [2023-11-12 02:23:13,696 INFO L226 Difference]: Without dead ends: 349 [2023-11-12 02:23:13,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 731 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:23:13,699 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 445 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:13,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 671 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:23:13,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-11-12 02:23:13,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 208. [2023-11-12 02:23:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 147 states have (on average 1.4557823129251701) internal successors, (214), 147 states have internal predecessors, (214), 58 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-12 02:23:13,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 330 transitions. [2023-11-12 02:23:13,755 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 330 transitions. Word has length 370 [2023-11-12 02:23:13,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:13,757 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 330 transitions. [2023-11-12 02:23:13,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) [2023-11-12 02:23:13,758 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 330 transitions. [2023-11-12 02:23:13,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2023-11-12 02:23:13,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:13,766 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:13,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:13,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-12 02:23:13,975 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:13,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:13,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1644962746, now seen corresponding path program 1 times [2023-11-12 02:23:13,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:13,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296109359] [2023-11-12 02:23:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:13,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:14,074 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:14,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249695197] [2023-11-12 02:23:14,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:14,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:14,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:14,076 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:14,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:23:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:14,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:23:14,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-12 02:23:14,943 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:14,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:14,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296109359] [2023-11-12 02:23:14,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:14,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249695197] [2023-11-12 02:23:14,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249695197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:14,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:14,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:23:14,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187761602] [2023-11-12 02:23:14,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:14,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:23:14,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:14,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:23:14,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:23:14,948 INFO L87 Difference]: Start difference. First operand 208 states and 330 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-12 02:23:15,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:15,252 INFO L93 Difference]: Finished difference Result 619 states and 985 transitions. [2023-11-12 02:23:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:23:15,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 371 [2023-11-12 02:23:15,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:15,259 INFO L225 Difference]: With dead ends: 619 [2023-11-12 02:23:15,259 INFO L226 Difference]: Without dead ends: 414 [2023-11-12 02:23:15,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:15,261 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 166 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:15,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 780 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:23:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2023-11-12 02:23:15,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 321. [2023-11-12 02:23:15,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 200 states have (on average 1.375) internal successors, (275), 200 states have internal predecessors, (275), 116 states have call successors, (116), 4 states have call predecessors, (116), 4 states have return successors, (116), 116 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-12 02:23:15,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 507 transitions. [2023-11-12 02:23:15,342 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 507 transitions. Word has length 371 [2023-11-12 02:23:15,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:15,344 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 507 transitions. [2023-11-12 02:23:15,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-12 02:23:15,344 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 507 transitions. [2023-11-12 02:23:15,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2023-11-12 02:23:15,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:15,352 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:15,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:15,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:15,560 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:15,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:15,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1250595960, now seen corresponding path program 1 times [2023-11-12 02:23:15,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:15,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265265272] [2023-11-12 02:23:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:15,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:15,659 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:15,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134345334] [2023-11-12 02:23:15,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:15,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:15,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:15,662 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:15,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:23:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:15,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:23:16,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-12 02:23:16,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:16,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:16,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265265272] [2023-11-12 02:23:16,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:16,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134345334] [2023-11-12 02:23:16,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134345334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:16,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:16,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:23:16,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052267312] [2023-11-12 02:23:16,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:16,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:23:16,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:16,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:23:16,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:16,070 INFO L87 Difference]: Start difference. First operand 321 states and 507 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-12 02:23:17,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:17,152 INFO L93 Difference]: Finished difference Result 1011 states and 1594 transitions. [2023-11-12 02:23:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:23:17,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 371 [2023-11-12 02:23:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:17,160 INFO L225 Difference]: With dead ends: 1011 [2023-11-12 02:23:17,160 INFO L226 Difference]: Without dead ends: 806 [2023-11-12 02:23:17,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:23:17,163 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 844 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:17,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 1332 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:23:17,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2023-11-12 02:23:17,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 648. [2023-11-12 02:23:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 424 states have (on average 1.375) internal successors, (583), 426 states have internal predecessors, (583), 215 states have call successors, (215), 8 states have call predecessors, (215), 8 states have return successors, (215), 213 states have call predecessors, (215), 215 states have call successors, (215) [2023-11-12 02:23:17,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1013 transitions. [2023-11-12 02:23:17,389 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1013 transitions. Word has length 371 [2023-11-12 02:23:17,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:17,390 INFO L495 AbstractCegarLoop]: Abstraction has 648 states and 1013 transitions. [2023-11-12 02:23:17,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-12 02:23:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1013 transitions. [2023-11-12 02:23:17,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-12 02:23:17,399 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:17,400 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:17,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:17,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:17,612 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:17,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:17,613 INFO L85 PathProgramCache]: Analyzing trace with hash -902867730, now seen corresponding path program 1 times [2023-11-12 02:23:17,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:17,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72918828] [2023-11-12 02:23:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:17,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:17,675 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:17,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005162138] [2023-11-12 02:23:17,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:17,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:17,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:17,677 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:17,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:23:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:17,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:23:18,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-12 02:23:18,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:18,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:18,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72918828] [2023-11-12 02:23:18,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:18,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005162138] [2023-11-12 02:23:18,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005162138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:18,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:18,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:23:18,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728031128] [2023-11-12 02:23:18,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:18,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:23:18,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:18,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:23:18,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:23:18,070 INFO L87 Difference]: Start difference. First operand 648 states and 1013 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-12 02:23:18,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:18,645 INFO L93 Difference]: Finished difference Result 1649 states and 2575 transitions. [2023-11-12 02:23:18,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:23:18,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 372 [2023-11-12 02:23:18,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:18,656 INFO L225 Difference]: With dead ends: 1649 [2023-11-12 02:23:18,657 INFO L226 Difference]: Without dead ends: 1108 [2023-11-12 02:23:18,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:23:18,660 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 472 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:18,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 945 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:23:18,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2023-11-12 02:23:18,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 656. [2023-11-12 02:23:18,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 432 states have (on average 1.3587962962962963) internal successors, (587), 434 states have internal predecessors, (587), 215 states have call successors, (215), 8 states have call predecessors, (215), 8 states have return successors, (215), 213 states have call predecessors, (215), 215 states have call successors, (215) [2023-11-12 02:23:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1017 transitions. [2023-11-12 02:23:18,805 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1017 transitions. Word has length 372 [2023-11-12 02:23:18,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:18,806 INFO L495 AbstractCegarLoop]: Abstraction has 656 states and 1017 transitions. [2023-11-12 02:23:18,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-12 02:23:18,807 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1017 transitions. [2023-11-12 02:23:18,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-12 02:23:18,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:18,814 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:18,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:19,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:19,023 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:19,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:19,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1412340820, now seen corresponding path program 1 times [2023-11-12 02:23:19,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:19,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461189444] [2023-11-12 02:23:19,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:19,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:19,087 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:19,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301855586] [2023-11-12 02:23:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:19,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:19,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:19,089 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:19,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:23:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:19,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:23:19,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-12 02:23:19,495 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:19,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:19,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461189444] [2023-11-12 02:23:19,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:19,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301855586] [2023-11-12 02:23:19,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301855586] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:19,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:19,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:23:19,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571472505] [2023-11-12 02:23:19,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:19,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:23:19,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:19,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:23:19,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:23:19,499 INFO L87 Difference]: Start difference. First operand 656 states and 1017 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-12 02:23:19,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:19,909 INFO L93 Difference]: Finished difference Result 1186 states and 1842 transitions. [2023-11-12 02:23:19,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:23:19,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 372 [2023-11-12 02:23:19,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:19,916 INFO L225 Difference]: With dead ends: 1186 [2023-11-12 02:23:19,916 INFO L226 Difference]: Without dead ends: 640 [2023-11-12 02:23:19,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:19,919 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 320 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:19,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 661 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:23:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2023-11-12 02:23:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 501. [2023-11-12 02:23:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 338 states have (on average 1.3757396449704142) internal successors, (465), 339 states have internal predecessors, (465), 157 states have call successors, (157), 5 states have call predecessors, (157), 5 states have return successors, (157), 156 states have call predecessors, (157), 157 states have call successors, (157) [2023-11-12 02:23:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 779 transitions. [2023-11-12 02:23:20,008 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 779 transitions. Word has length 372 [2023-11-12 02:23:20,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:20,009 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 779 transitions. [2023-11-12 02:23:20,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-12 02:23:20,009 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 779 transitions. [2023-11-12 02:23:20,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-12 02:23:20,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:20,017 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:20,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:20,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:20,231 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:20,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:20,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2009523100, now seen corresponding path program 1 times [2023-11-12 02:23:20,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:20,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935047917] [2023-11-12 02:23:20,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:20,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:20,287 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:20,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261977437] [2023-11-12 02:23:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:20,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:20,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:20,289 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:20,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:23:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:20,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:23:20,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-12 02:23:20,723 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:20,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:20,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935047917] [2023-11-12 02:23:20,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:20,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261977437] [2023-11-12 02:23:20,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261977437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:20,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:20,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:23:20,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378873730] [2023-11-12 02:23:20,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:20,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:23:20,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:20,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:23:20,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:23:20,727 INFO L87 Difference]: Start difference. First operand 501 states and 779 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-12 02:23:20,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:20,934 INFO L93 Difference]: Finished difference Result 1025 states and 1593 transitions. [2023-11-12 02:23:20,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:23:20,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 372 [2023-11-12 02:23:20,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:20,941 INFO L225 Difference]: With dead ends: 1025 [2023-11-12 02:23:20,942 INFO L226 Difference]: Without dead ends: 640 [2023-11-12 02:23:20,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:20,945 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 288 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:20,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 1097 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:23:20,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2023-11-12 02:23:21,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 501. [2023-11-12 02:23:21,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 338 states have (on average 1.3698224852071006) internal successors, (463), 339 states have internal predecessors, (463), 157 states have call successors, (157), 5 states have call predecessors, (157), 5 states have return successors, (157), 156 states have call predecessors, (157), 157 states have call successors, (157) [2023-11-12 02:23:21,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 777 transitions. [2023-11-12 02:23:21,050 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 777 transitions. Word has length 372 [2023-11-12 02:23:21,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:21,051 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 777 transitions. [2023-11-12 02:23:21,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-12 02:23:21,051 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 777 transitions. [2023-11-12 02:23:21,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-12 02:23:21,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:21,055 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:21,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:21,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:21,268 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:21,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:21,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1862742370, now seen corresponding path program 1 times [2023-11-12 02:23:21,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:21,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772855908] [2023-11-12 02:23:21,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:21,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:21,341 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:21,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769140854] [2023-11-12 02:23:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:21,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:21,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:21,343 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:21,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:23:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:21,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:23:21,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-12 02:23:21,762 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:21,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:21,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772855908] [2023-11-12 02:23:21,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:21,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769140854] [2023-11-12 02:23:21,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769140854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:21,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:21,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:23:21,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378056355] [2023-11-12 02:23:21,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:21,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:23:21,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:21,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:23:21,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:23:21,767 INFO L87 Difference]: Start difference. First operand 501 states and 777 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-12 02:23:22,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:22,201 INFO L93 Difference]: Finished difference Result 1555 states and 2395 transitions. [2023-11-12 02:23:22,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:23:22,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 372 [2023-11-12 02:23:22,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:22,212 INFO L225 Difference]: With dead ends: 1555 [2023-11-12 02:23:22,213 INFO L226 Difference]: Without dead ends: 1168 [2023-11-12 02:23:22,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:22,216 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 437 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:22,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 827 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:23:22,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2023-11-12 02:23:22,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 699. [2023-11-12 02:23:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 474 states have (on average 1.3523206751054853) internal successors, (641), 476 states have internal predecessors, (641), 215 states have call successors, (215), 9 states have call predecessors, (215), 9 states have return successors, (215), 213 states have call predecessors, (215), 215 states have call successors, (215) [2023-11-12 02:23:22,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1071 transitions. [2023-11-12 02:23:22,361 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1071 transitions. Word has length 372 [2023-11-12 02:23:22,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:22,362 INFO L495 AbstractCegarLoop]: Abstraction has 699 states and 1071 transitions. [2023-11-12 02:23:22,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-12 02:23:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1071 transitions. [2023-11-12 02:23:22,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-12 02:23:22,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:22,366 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:22,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:22,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:22,574 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:22,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:22,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1587982756, now seen corresponding path program 1 times [2023-11-12 02:23:22,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:22,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212466340] [2023-11-12 02:23:22,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:22,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:22,632 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:22,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988709522] [2023-11-12 02:23:22,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:22,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:22,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:22,634 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:22,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:23:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:23,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:23:23,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-12 02:23:23,103 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:23,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:23,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212466340] [2023-11-12 02:23:23,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:23,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988709522] [2023-11-12 02:23:23,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988709522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:23,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:23,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:23:23,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759254601] [2023-11-12 02:23:23,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:23,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:23:23,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:23,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:23:23,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:23:23,108 INFO L87 Difference]: Start difference. First operand 699 states and 1071 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-12 02:23:23,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:23,450 INFO L93 Difference]: Finished difference Result 1815 states and 2789 transitions. [2023-11-12 02:23:23,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:23:23,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 372 [2023-11-12 02:23:23,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:23,462 INFO L225 Difference]: With dead ends: 1815 [2023-11-12 02:23:23,462 INFO L226 Difference]: Without dead ends: 1238 [2023-11-12 02:23:23,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:23:23,465 INFO L413 NwaCegarLoop]: 667 mSDtfsCounter, 515 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:23,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 1151 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:23:23,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2023-11-12 02:23:23,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 711. [2023-11-12 02:23:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 486 states have (on average 1.3559670781893005) internal successors, (659), 488 states have internal predecessors, (659), 215 states have call successors, (215), 9 states have call predecessors, (215), 9 states have return successors, (215), 213 states have call predecessors, (215), 215 states have call successors, (215) [2023-11-12 02:23:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1089 transitions. [2023-11-12 02:23:23,661 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1089 transitions. Word has length 372 [2023-11-12 02:23:23,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:23,662 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 1089 transitions. [2023-11-12 02:23:23,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-12 02:23:23,662 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1089 transitions. [2023-11-12 02:23:23,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-12 02:23:23,665 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:23,666 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:23,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:23,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:23:23,876 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:23,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:23,877 INFO L85 PathProgramCache]: Analyzing trace with hash 586857760, now seen corresponding path program 1 times [2023-11-12 02:23:23,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:23,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110551444] [2023-11-12 02:23:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:23,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:23,934 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:23,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600202647] [2023-11-12 02:23:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:23,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:23,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:23,936 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:23,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:23:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:24,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:23:24,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 2551 proven. 42 refuted. 0 times theorem prover too weak. 4019 trivial. 0 not checked. [2023-11-12 02:23:24,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 129 proven. 42 refuted. 0 times theorem prover too weak. 6441 trivial. 0 not checked. [2023-11-12 02:23:24,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:24,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110551444] [2023-11-12 02:23:24,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:24,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600202647] [2023-11-12 02:23:24,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600202647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:24,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:23:24,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:23:24,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692152863] [2023-11-12 02:23:24,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:24,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:23:24,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:24,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:23:24,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:23:24,723 INFO L87 Difference]: Start difference. First operand 711 states and 1089 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 2 states have call successors, (72), 2 states have call predecessors, (72), 4 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2023-11-12 02:23:25,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:25,196 INFO L93 Difference]: Finished difference Result 1101 states and 1661 transitions. [2023-11-12 02:23:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:23:25,197 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 2 states have call successors, (72), 2 states have call predecessors, (72), 4 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) Word has length 372 [2023-11-12 02:23:25,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:25,202 INFO L225 Difference]: With dead ends: 1101 [2023-11-12 02:23:25,203 INFO L226 Difference]: Without dead ends: 510 [2023-11-12 02:23:25,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 736 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:23:25,206 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 178 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:25,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 490 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:23:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-11-12 02:23:25,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 333. [2023-11-12 02:23:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 208 states have (on average 1.2692307692307692) internal successors, (264), 208 states have internal predecessors, (264), 116 states have call successors, (116), 8 states have call predecessors, (116), 8 states have return successors, (116), 116 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-12 02:23:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 496 transitions. [2023-11-12 02:23:25,279 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 496 transitions. Word has length 372 [2023-11-12 02:23:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:25,280 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 496 transitions. [2023-11-12 02:23:25,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 2 states have call successors, (72), 2 states have call predecessors, (72), 4 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2023-11-12 02:23:25,281 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 496 transitions. [2023-11-12 02:23:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2023-11-12 02:23:25,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:25,284 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:25,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:25,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:23:25,493 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:25,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:25,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1962781437, now seen corresponding path program 1 times [2023-11-12 02:23:25,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:25,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018105375] [2023-11-12 02:23:25,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:25,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:25,556 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:25,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530825900] [2023-11-12 02:23:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:25,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:25,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:25,558 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:25,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:23:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:25,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:23:25,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-12 02:23:26,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:26,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:26,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018105375] [2023-11-12 02:23:26,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:26,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530825900] [2023-11-12 02:23:26,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530825900] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:26,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:26,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:23:26,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456803439] [2023-11-12 02:23:26,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:26,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:26,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:26,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:26,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:23:26,005 INFO L87 Difference]: Start difference. First operand 333 states and 496 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-12 02:23:26,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:26,113 INFO L93 Difference]: Finished difference Result 542 states and 807 transitions. [2023-11-12 02:23:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:26,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 373 [2023-11-12 02:23:26,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:26,117 INFO L225 Difference]: With dead ends: 542 [2023-11-12 02:23:26,118 INFO L226 Difference]: Without dead ends: 333 [2023-11-12 02:23:26,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:23:26,120 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 43 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:26,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 467 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:23:26,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-12 02:23:26,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2023-11-12 02:23:26,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 208 states have (on average 1.2644230769230769) internal successors, (263), 208 states have internal predecessors, (263), 116 states have call successors, (116), 8 states have call predecessors, (116), 8 states have return successors, (116), 116 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-12 02:23:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 495 transitions. [2023-11-12 02:23:26,231 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 495 transitions. Word has length 373 [2023-11-12 02:23:26,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:26,232 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 495 transitions. [2023-11-12 02:23:26,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-12 02:23:26,233 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 495 transitions. [2023-11-12 02:23:26,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2023-11-12 02:23:26,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:26,238 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:26,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:26,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:26,447 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:26,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:26,447 INFO L85 PathProgramCache]: Analyzing trace with hash 2096794943, now seen corresponding path program 1 times [2023-11-12 02:23:26,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:26,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874359872] [2023-11-12 02:23:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:26,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:26,516 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:26,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386776873] [2023-11-12 02:23:26,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:26,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:26,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:26,518 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:26,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:23:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:27,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-12 02:23:27,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 3644 proven. 582 refuted. 0 times theorem prover too weak. 2386 trivial. 0 not checked. [2023-11-12 02:23:31,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 204 proven. 300 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2023-11-12 02:23:38,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:38,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874359872] [2023-11-12 02:23:38,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:38,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386776873] [2023-11-12 02:23:38,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386776873] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:38,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:23:38,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 38 [2023-11-12 02:23:38,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334749955] [2023-11-12 02:23:38,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:38,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-12 02:23:38,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:38,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-12 02:23:38,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2023-11-12 02:23:38,052 INFO L87 Difference]: Start difference. First operand 333 states and 495 transitions. Second operand has 38 states, 36 states have (on average 5.027777777777778) internal successors, (181), 34 states have internal predecessors, (181), 12 states have call successors, (97), 7 states have call predecessors, (97), 13 states have return successors, (98), 13 states have call predecessors, (98), 12 states have call successors, (98) [2023-11-12 02:23:46,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:46,593 INFO L93 Difference]: Finished difference Result 1239 states and 1740 transitions. [2023-11-12 02:23:46,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-12 02:23:46,596 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 5.027777777777778) internal successors, (181), 34 states have internal predecessors, (181), 12 states have call successors, (97), 7 states have call predecessors, (97), 13 states have return successors, (98), 13 states have call predecessors, (98), 12 states have call successors, (98) Word has length 373 [2023-11-12 02:23:46,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:46,606 INFO L225 Difference]: With dead ends: 1239 [2023-11-12 02:23:46,606 INFO L226 Difference]: Without dead ends: 1030 [2023-11-12 02:23:46,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 719 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4303 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3144, Invalid=10898, Unknown=0, NotChecked=0, Total=14042 [2023-11-12 02:23:46,614 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 1468 mSDsluCounter, 2431 mSDsCounter, 0 mSdLazyCounter, 3296 mSolverCounterSat, 897 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 2778 SdHoareTripleChecker+Invalid, 4193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 897 IncrementalHoareTripleChecker+Valid, 3296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:46,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1486 Valid, 2778 Invalid, 4193 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [897 Valid, 3296 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-12 02:23:46,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2023-11-12 02:23:46,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 523. [2023-11-12 02:23:46,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 366 states have (on average 1.278688524590164) internal successors, (468), 367 states have internal predecessors, (468), 134 states have call successors, (134), 22 states have call predecessors, (134), 22 states have return successors, (134), 133 states have call predecessors, (134), 134 states have call successors, (134) [2023-11-12 02:23:46,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 736 transitions. [2023-11-12 02:23:46,751 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 736 transitions. Word has length 373 [2023-11-12 02:23:46,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:46,752 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 736 transitions. [2023-11-12 02:23:46,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 5.027777777777778) internal successors, (181), 34 states have internal predecessors, (181), 12 states have call successors, (97), 7 states have call predecessors, (97), 13 states have return successors, (98), 13 states have call predecessors, (98), 12 states have call successors, (98) [2023-11-12 02:23:46,753 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 736 transitions. [2023-11-12 02:23:46,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2023-11-12 02:23:46,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:46,756 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:46,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:46,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:46,965 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:46,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:46,965 INFO L85 PathProgramCache]: Analyzing trace with hash 758404849, now seen corresponding path program 1 times [2023-11-12 02:23:46,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:46,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829938232] [2023-11-12 02:23:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:46,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:47,032 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:47,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135488131] [2023-11-12 02:23:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:47,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:47,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:47,034 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:47,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e7442f4-71f1-4d3e-a46f-2e13e8399c96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:23:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:47,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-12 02:23:47,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 3548 proven. 588 refuted. 0 times theorem prover too weak. 2476 trivial. 0 not checked. [2023-11-12 02:23:51,974 INFO L327 TraceCheckSpWp]: Computing backward predicates...