./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-59.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-59.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2761ad5b8b5d660ea43c0926578149a1a33205183f80a80f035b1bec4306cb62 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:52:20,759 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:52:20,898 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:52:20,905 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:52:20,907 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:52:20,955 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:52:20,955 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:52:20,956 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:52:20,958 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:52:20,964 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:52:20,964 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:52:20,965 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:52:20,966 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:52:20,968 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:52:20,969 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:52:20,969 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:52:20,970 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:52:20,970 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:52:20,971 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:52:20,971 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:52:20,972 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:52:20,973 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:52:20,973 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:52:20,974 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:52:20,974 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:52:20,975 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:52:20,975 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:52:20,977 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:52:20,977 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:52:20,978 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:52:20,979 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:52:20,980 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:52:20,980 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:52:20,980 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:52:20,998 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:52:20,999 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:52:20,999 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:52:20,999 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:52:21,000 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:52:21,000 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:52:21,000 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:52:21,001 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:52:21,001 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_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2761ad5b8b5d660ea43c0926578149a1a33205183f80a80f035b1bec4306cb62 [2023-11-26 11:52:21,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:52:21,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:52:21,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:52:21,412 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:52:21,413 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:52:21,414 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-59.i [2023-11-26 11:52:24,732 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:52:25,090 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:52:25,092 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-59.i [2023-11-26 11:52:25,107 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/data/55b5045b6/68ede06a68714c67bce1771171e80949/FLAG76bff35c4 [2023-11-26 11:52:25,125 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/data/55b5045b6/68ede06a68714c67bce1771171e80949 [2023-11-26 11:52:25,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:52:25,129 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:52:25,131 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:52:25,131 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:52:25,137 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:52:25,138 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:52:25" (1/1) ... [2023-11-26 11:52:25,140 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2984677a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:25, skipping insertion in model container [2023-11-26 11:52:25,140 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:52:25" (1/1) ... [2023-11-26 11:52:25,194 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:52:25,365 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_df0a5173-c37c-4efc-9d51-06cff190f9b5/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-59.i[916,929] [2023-11-26 11:52:25,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:52:25,487 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:52:25,500 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_df0a5173-c37c-4efc-9d51-06cff190f9b5/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-59.i[916,929] [2023-11-26 11:52:25,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:52:25,599 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:52:25,600 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:25 WrapperNode [2023-11-26 11:52:25,600 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:52:25,601 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:52:25,601 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:52:25,602 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:52:25,609 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:25" (1/1) ... [2023-11-26 11:52:25,635 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:25" (1/1) ... [2023-11-26 11:52:25,721 INFO L138 Inliner]: procedures = 26, calls = 34, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 261 [2023-11-26 11:52:25,721 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:52:25,722 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:52:25,722 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:52:25,722 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:52:25,734 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:25" (1/1) ... [2023-11-26 11:52:25,735 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:25" (1/1) ... [2023-11-26 11:52:25,753 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:25" (1/1) ... [2023-11-26 11:52:25,835 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:52:25,835 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:25" (1/1) ... [2023-11-26 11:52:25,836 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:25" (1/1) ... [2023-11-26 11:52:25,862 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:25" (1/1) ... [2023-11-26 11:52:25,892 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:25" (1/1) ... [2023-11-26 11:52:25,900 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:25" (1/1) ... [2023-11-26 11:52:25,930 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:25" (1/1) ... [2023-11-26 11:52:25,940 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:52:25,941 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:52:25,942 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:52:25,943 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:52:25,944 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:25" (1/1) ... [2023-11-26 11:52:25,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:52:25,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:25,980 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:52:26,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:52:26,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:52:26,021 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:52:26,021 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:52:26,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:52:26,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:52:26,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:52:26,113 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:52:26,117 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:52:26,828 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:52:26,879 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:52:26,879 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:52:26,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:52:26 BoogieIcfgContainer [2023-11-26 11:52:26,880 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:52:26,882 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:52:26,883 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:52:26,886 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:52:26,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:52:25" (1/3) ... [2023-11-26 11:52:26,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e5d66fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:52:26, skipping insertion in model container [2023-11-26 11:52:26,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:25" (2/3) ... [2023-11-26 11:52:26,890 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e5d66fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:52:26, skipping insertion in model container [2023-11-26 11:52:26,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:52:26" (3/3) ... [2023-11-26 11:52:26,892 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_100-while_file-59.i [2023-11-26 11:52:26,912 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:52:26,912 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:52:26,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:52:26,987 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;@4091451f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:52:26,987 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:52:26,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 72 states have (on average 1.625) internal successors, (117), 73 states have internal predecessors, (117), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-26 11:52:27,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-26 11:52:27,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:27,011 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:27,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:27,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:27,021 INFO L85 PathProgramCache]: Analyzing trace with hash -175020672, now seen corresponding path program 1 times [2023-11-26 11:52:27,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:27,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602016781] [2023-11-26 11:52:27,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:27,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:27,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:27,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602016781] [2023-11-26 11:52:27,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:52:27,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751919128] [2023-11-26 11:52:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:27,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:27,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:27,237 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:27,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:52:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:27,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:52:27,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2023-11-26 11:52:27,552 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:27,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751919128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:27,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:27,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:52:27,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448589411] [2023-11-26 11:52:27,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:27,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:52:27,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:27,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:52:27,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:52:27,602 INFO L87 Difference]: Start difference. First operand has 96 states, 72 states have (on average 1.625) internal successors, (117), 73 states have internal predecessors, (117), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-26 11:52:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:27,675 INFO L93 Difference]: Finished difference Result 189 states and 337 transitions. [2023-11-26 11:52:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:52:27,678 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 2 states have call successors, (21) Word has length 144 [2023-11-26 11:52:27,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:27,690 INFO L225 Difference]: With dead ends: 189 [2023-11-26 11:52:27,690 INFO L226 Difference]: Without dead ends: 94 [2023-11-26 11:52:27,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:52:27,703 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:27,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 150 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:52:27,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-26 11:52:27,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-26 11:52:27,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.5633802816901408) internal successors, (111), 71 states have internal predecessors, (111), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-26 11:52:27,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 153 transitions. [2023-11-26 11:52:27,778 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 153 transitions. Word has length 144 [2023-11-26 11:52:27,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:27,778 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 153 transitions. [2023-11-26 11:52:27,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-26 11:52:27,780 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 153 transitions. [2023-11-26 11:52:27,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-26 11:52:27,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:27,793 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:27,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:28,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:52:28,001 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:28,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:28,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1189218426, now seen corresponding path program 1 times [2023-11-26 11:52:28,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:28,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940707432] [2023-11-26 11:52:28,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:28,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:28,131 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:28,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936559703] [2023-11-26 11:52:28,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:28,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:28,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:28,138 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:28,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:52:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:28,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:52:28,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-26 11:52:28,371 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:28,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:28,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940707432] [2023-11-26 11:52:28,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:28,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936559703] [2023-11-26 11:52:28,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936559703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:28,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:28,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:52:28,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320271211] [2023-11-26 11:52:28,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:28,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:52:28,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:28,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:52:28,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:28,379 INFO L87 Difference]: Start difference. First operand 94 states and 153 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:52:28,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:28,433 INFO L93 Difference]: Finished difference Result 187 states and 305 transitions. [2023-11-26 11:52:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:52:28,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 144 [2023-11-26 11:52:28,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:28,441 INFO L225 Difference]: With dead ends: 187 [2023-11-26 11:52:28,441 INFO L226 Difference]: Without dead ends: 94 [2023-11-26 11:52:28,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:28,447 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 39 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:28,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 253 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:52:28,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-26 11:52:28,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-26 11:52:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.5492957746478873) internal successors, (110), 71 states have internal predecessors, (110), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-26 11:52:28,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 152 transitions. [2023-11-26 11:52:28,465 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 152 transitions. Word has length 144 [2023-11-26 11:52:28,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:28,471 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 152 transitions. [2023-11-26 11:52:28,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:52:28,472 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 152 transitions. [2023-11-26 11:52:28,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-26 11:52:28,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:28,476 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:28,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:28,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:28,680 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:28,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:28,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1976437761, now seen corresponding path program 1 times [2023-11-26 11:52:28,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:28,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065693526] [2023-11-26 11:52:28,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:28,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:28,785 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:28,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648781632] [2023-11-26 11:52:28,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:28,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:28,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:28,792 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:28,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:52:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:28,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:52:28,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-26 11:52:29,060 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:29,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:29,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065693526] [2023-11-26 11:52:29,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:29,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648781632] [2023-11-26 11:52:29,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648781632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:29,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:29,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:52:29,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106462747] [2023-11-26 11:52:29,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:29,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:52:29,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:29,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:52:29,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:29,065 INFO L87 Difference]: Start difference. First operand 94 states and 152 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:52:29,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:29,187 INFO L93 Difference]: Finished difference Result 277 states and 448 transitions. [2023-11-26 11:52:29,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:52:29,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 145 [2023-11-26 11:52:29,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:29,196 INFO L225 Difference]: With dead ends: 277 [2023-11-26 11:52:29,197 INFO L226 Difference]: Without dead ends: 184 [2023-11-26 11:52:29,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:29,202 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 130 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:29,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 268 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:52:29,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-26 11:52:29,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2023-11-26 11:52:29,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 137 states have (on average 1.4963503649635037) internal successors, (205), 137 states have internal predecessors, (205), 42 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-26 11:52:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 289 transitions. [2023-11-26 11:52:29,265 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 289 transitions. Word has length 145 [2023-11-26 11:52:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:29,267 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 289 transitions. [2023-11-26 11:52:29,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:52:29,268 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 289 transitions. [2023-11-26 11:52:29,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-26 11:52:29,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:29,274 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:29,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:29,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:29,482 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:29,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:29,483 INFO L85 PathProgramCache]: Analyzing trace with hash 712934493, now seen corresponding path program 1 times [2023-11-26 11:52:29,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:29,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943692001] [2023-11-26 11:52:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:29,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:29,549 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:29,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342905463] [2023-11-26 11:52:29,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:29,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:29,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:29,552 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:29,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:52:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:29,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:52:29,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-26 11:52:29,809 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:29,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:29,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943692001] [2023-11-26 11:52:29,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:29,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342905463] [2023-11-26 11:52:29,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342905463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:29,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:29,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:52:29,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891396017] [2023-11-26 11:52:29,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:29,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:52:29,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:29,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:52:29,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:52:29,814 INFO L87 Difference]: Start difference. First operand 182 states and 289 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:52:29,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:29,866 INFO L93 Difference]: Finished difference Result 369 states and 585 transitions. [2023-11-26 11:52:29,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:52:29,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 146 [2023-11-26 11:52:29,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:29,871 INFO L225 Difference]: With dead ends: 369 [2023-11-26 11:52:29,871 INFO L226 Difference]: Without dead ends: 188 [2023-11-26 11:52:29,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:52:29,873 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 1 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:29,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 430 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:52:29,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-26 11:52:29,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2023-11-26 11:52:29,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 141 states have (on average 1.4822695035460993) internal successors, (209), 141 states have internal predecessors, (209), 42 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-26 11:52:29,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 293 transitions. [2023-11-26 11:52:29,896 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 293 transitions. Word has length 146 [2023-11-26 11:52:29,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:29,897 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 293 transitions. [2023-11-26 11:52:29,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:52:29,898 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 293 transitions. [2023-11-26 11:52:29,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-26 11:52:29,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:29,901 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:29,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:30,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:30,109 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:30,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:30,110 INFO L85 PathProgramCache]: Analyzing trace with hash -96412133, now seen corresponding path program 1 times [2023-11-26 11:52:30,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:30,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488209333] [2023-11-26 11:52:30,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:30,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:30,171 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:30,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871924139] [2023-11-26 11:52:30,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:30,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:30,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:30,177 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:30,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:52:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:30,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:52:30,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2023-11-26 11:52:30,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:30,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:30,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488209333] [2023-11-26 11:52:30,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:30,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871924139] [2023-11-26 11:52:30,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871924139] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:30,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:30,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:52:30,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553426699] [2023-11-26 11:52:30,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:30,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:52:30,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:30,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:52:30,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:52:30,779 INFO L87 Difference]: Start difference. First operand 186 states and 293 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:52:31,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:31,519 INFO L93 Difference]: Finished difference Result 311 states and 480 transitions. [2023-11-26 11:52:31,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:52:31,523 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 146 [2023-11-26 11:52:31,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:31,525 INFO L225 Difference]: With dead ends: 311 [2023-11-26 11:52:31,525 INFO L226 Difference]: Without dead ends: 126 [2023-11-26 11:52:31,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:52:31,528 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 244 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:31,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 384 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:52:31,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-26 11:52:31,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 114. [2023-11-26 11:52:31,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 90 states have (on average 1.3888888888888888) internal successors, (125), 90 states have internal predecessors, (125), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-26 11:52:31,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 167 transitions. [2023-11-26 11:52:31,547 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 167 transitions. Word has length 146 [2023-11-26 11:52:31,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:31,548 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 167 transitions. [2023-11-26 11:52:31,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:52:31,549 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 167 transitions. [2023-11-26 11:52:31,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-26 11:52:31,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:31,551 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:31,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:31,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:31,761 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:31,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:31,762 INFO L85 PathProgramCache]: Analyzing trace with hash -914060583, now seen corresponding path program 1 times [2023-11-26 11:52:31,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:31,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345434074] [2023-11-26 11:52:31,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:31,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:31,796 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:31,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17377635] [2023-11-26 11:52:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:31,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:31,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:31,798 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:31,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:52:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:32,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 11:52:32,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 182 proven. 108 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2023-11-26 11:52:32,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:33,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:33,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345434074] [2023-11-26 11:52:33,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:33,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17377635] [2023-11-26 11:52:33,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17377635] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:33,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:33,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-26 11:52:33,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858051518] [2023-11-26 11:52:33,203 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:33,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:52:33,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:33,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:52:33,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:52:33,205 INFO L87 Difference]: Start difference. First operand 114 states and 167 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 3 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-26 11:52:34,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:34,090 INFO L93 Difference]: Finished difference Result 301 states and 432 transitions. [2023-11-26 11:52:34,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:52:34,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 3 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 3 states have call successors, (21) Word has length 146 [2023-11-26 11:52:34,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:34,096 INFO L225 Difference]: With dead ends: 301 [2023-11-26 11:52:34,096 INFO L226 Difference]: Without dead ends: 184 [2023-11-26 11:52:34,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:52:34,098 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 162 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:34,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 499 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:52:34,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-26 11:52:34,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 169. [2023-11-26 11:52:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 143 states have (on average 1.3636363636363635) internal successors, (195), 143 states have internal predecessors, (195), 21 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-26 11:52:34,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 237 transitions. [2023-11-26 11:52:34,120 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 237 transitions. Word has length 146 [2023-11-26 11:52:34,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:34,121 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 237 transitions. [2023-11-26 11:52:34,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 3 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-26 11:52:34,122 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 237 transitions. [2023-11-26 11:52:34,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-26 11:52:34,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:34,125 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:34,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-26 11:52:34,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:34,333 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:34,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:34,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1009167451, now seen corresponding path program 1 times [2023-11-26 11:52:34,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:34,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668727269] [2023-11-26 11:52:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:34,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:34,383 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:34,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443030808] [2023-11-26 11:52:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:34,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:34,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:34,385 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:34,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:52:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:34,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:52:34,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-26 11:52:34,700 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:34,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:34,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668727269] [2023-11-26 11:52:34,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:34,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443030808] [2023-11-26 11:52:34,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443030808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:34,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:34,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:52:34,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352548379] [2023-11-26 11:52:34,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:34,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:52:34,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:34,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:52:34,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:52:34,708 INFO L87 Difference]: Start difference. First operand 169 states and 237 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:52:34,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:34,929 INFO L93 Difference]: Finished difference Result 346 states and 484 transitions. [2023-11-26 11:52:34,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:52:34,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 146 [2023-11-26 11:52:34,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:34,933 INFO L225 Difference]: With dead ends: 346 [2023-11-26 11:52:34,933 INFO L226 Difference]: Without dead ends: 178 [2023-11-26 11:52:34,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:52:34,934 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 83 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:34,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 322 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:52:34,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-26 11:52:34,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 169. [2023-11-26 11:52:34,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 143 states have (on average 1.3566433566433567) internal successors, (194), 143 states have internal predecessors, (194), 21 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-26 11:52:34,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 236 transitions. [2023-11-26 11:52:34,957 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 236 transitions. Word has length 146 [2023-11-26 11:52:34,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:34,958 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 236 transitions. [2023-11-26 11:52:34,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:52:34,958 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 236 transitions. [2023-11-26 11:52:34,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-26 11:52:34,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:34,960 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:34,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:35,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:35,168 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:35,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:35,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1289751264, now seen corresponding path program 1 times [2023-11-26 11:52:35,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:35,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122309502] [2023-11-26 11:52:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:35,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:35,202 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:35,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74363323] [2023-11-26 11:52:35,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:35,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:35,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:35,204 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:35,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:52:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:35,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 11:52:35,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 136 proven. 159 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2023-11-26 11:52:36,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:37,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:37,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122309502] [2023-11-26 11:52:37,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:37,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74363323] [2023-11-26 11:52:37,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74363323] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:37,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:37,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-26 11:52:37,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068261284] [2023-11-26 11:52:37,062 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:37,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:52:37,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:37,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:52:37,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:52:37,064 INFO L87 Difference]: Start difference. First operand 169 states and 236 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-26 11:52:38,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:38,606 INFO L93 Difference]: Finished difference Result 416 states and 568 transitions. [2023-11-26 11:52:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-26 11:52:38,607 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) Word has length 148 [2023-11-26 11:52:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:38,609 INFO L225 Difference]: With dead ends: 416 [2023-11-26 11:52:38,609 INFO L226 Difference]: Without dead ends: 248 [2023-11-26 11:52:38,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=1083, Unknown=0, NotChecked=0, Total=1406 [2023-11-26 11:52:38,612 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 196 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:38,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 878 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:52:38,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-26 11:52:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 173. [2023-11-26 11:52:38,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 146 states have (on average 1.3424657534246576) internal successors, (196), 146 states have internal predecessors, (196), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-26 11:52:38,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 238 transitions. [2023-11-26 11:52:38,646 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 238 transitions. Word has length 148 [2023-11-26 11:52:38,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:38,650 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 238 transitions. [2023-11-26 11:52:38,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-26 11:52:38,651 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 238 transitions. [2023-11-26 11:52:38,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-26 11:52:38,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:38,653 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:38,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:38,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:52:38,861 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:38,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:38,861 INFO L85 PathProgramCache]: Analyzing trace with hash 515687070, now seen corresponding path program 1 times [2023-11-26 11:52:38,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:38,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424036748] [2023-11-26 11:52:38,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:38,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:38,894 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:38,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152902767] [2023-11-26 11:52:38,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:38,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:38,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:38,896 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:38,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:52:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:39,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-26 11:52:39,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 88 proven. 204 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2023-11-26 11:52:40,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-26 11:52:41,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:41,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424036748] [2023-11-26 11:52:41,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:41,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152902767] [2023-11-26 11:52:41,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152902767] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:41,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:41,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [15] total 19 [2023-11-26 11:52:41,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584411954] [2023-11-26 11:52:41,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:41,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:52:41,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:41,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:52:41,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:52:41,644 INFO L87 Difference]: Start difference. First operand 173 states and 238 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:52:41,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:41,918 INFO L93 Difference]: Finished difference Result 346 states and 476 transitions. [2023-11-26 11:52:41,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:52:41,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 148 [2023-11-26 11:52:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:41,921 INFO L225 Difference]: With dead ends: 346 [2023-11-26 11:52:41,922 INFO L226 Difference]: Without dead ends: 174 [2023-11-26 11:52:41,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:52:41,923 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 258 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:41,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 276 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:52:41,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-26 11:52:41,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2023-11-26 11:52:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 146 states have (on average 1.3356164383561644) internal successors, (195), 146 states have internal predecessors, (195), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-26 11:52:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 237 transitions. [2023-11-26 11:52:41,940 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 237 transitions. Word has length 148 [2023-11-26 11:52:41,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:41,940 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 237 transitions. [2023-11-26 11:52:41,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:52:41,941 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 237 transitions. [2023-11-26 11:52:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-26 11:52:41,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:41,943 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:41,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:42,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 11:52:42,150 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:42,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:42,151 INFO L85 PathProgramCache]: Analyzing trace with hash -177496799, now seen corresponding path program 1 times [2023-11-26 11:52:42,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:42,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659913421] [2023-11-26 11:52:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:42,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:42,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:42,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680051202] [2023-11-26 11:52:42,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:42,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:42,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:42,176 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:42,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:52:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:42,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:52:42,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-26 11:52:42,438 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:42,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:42,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659913421] [2023-11-26 11:52:42,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:42,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680051202] [2023-11-26 11:52:42,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680051202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:42,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:42,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:52:42,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053282895] [2023-11-26 11:52:42,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:42,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:52:42,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:42,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:52:42,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:42,442 INFO L87 Difference]: Start difference. First operand 173 states and 237 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:52:42,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:42,587 INFO L93 Difference]: Finished difference Result 429 states and 586 transitions. [2023-11-26 11:52:42,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:52:42,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 151 [2023-11-26 11:52:42,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:42,590 INFO L225 Difference]: With dead ends: 429 [2023-11-26 11:52:42,590 INFO L226 Difference]: Without dead ends: 257 [2023-11-26 11:52:42,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:42,591 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 104 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:42,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 206 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:52:42,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-11-26 11:52:42,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 187. [2023-11-26 11:52:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 160 states have (on average 1.31875) internal successors, (211), 160 states have internal predecessors, (211), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-26 11:52:42,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 253 transitions. [2023-11-26 11:52:42,612 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 253 transitions. Word has length 151 [2023-11-26 11:52:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:42,612 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 253 transitions. [2023-11-26 11:52:42,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:52:42,613 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 253 transitions. [2023-11-26 11:52:42,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-26 11:52:42,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:42,615 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:42,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:42,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:52:42,821 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:42,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:42,822 INFO L85 PathProgramCache]: Analyzing trace with hash 502561571, now seen corresponding path program 1 times [2023-11-26 11:52:42,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:42,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646493457] [2023-11-26 11:52:42,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:42,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:42,899 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:42,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128193813] [2023-11-26 11:52:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:42,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:42,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:42,914 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:42,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:52:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:43,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:52:43,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:43,693 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 182 proven. 108 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2023-11-26 11:52:43,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 6 proven. 111 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2023-11-26 11:52:44,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:44,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646493457] [2023-11-26 11:52:44,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:44,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128193813] [2023-11-26 11:52:44,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128193813] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:44,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:52:44,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-26 11:52:44,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682239755] [2023-11-26 11:52:44,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:44,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:52:44,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:44,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:52:44,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:52:44,085 INFO L87 Difference]: Start difference. First operand 187 states and 253 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 5 states have call successors, (41), 3 states have call predecessors, (41), 7 states have return successors, (42), 4 states have call predecessors, (42), 5 states have call successors, (42) [2023-11-26 11:52:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:44,960 INFO L93 Difference]: Finished difference Result 395 states and 531 transitions. [2023-11-26 11:52:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 11:52:44,961 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 5 states have call successors, (41), 3 states have call predecessors, (41), 7 states have return successors, (42), 4 states have call predecessors, (42), 5 states have call successors, (42) Word has length 151 [2023-11-26 11:52:44,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:44,963 INFO L225 Difference]: With dead ends: 395 [2023-11-26 11:52:44,963 INFO L226 Difference]: Without dead ends: 209 [2023-11-26 11:52:44,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2023-11-26 11:52:44,966 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 319 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:44,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 447 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:52:44,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-26 11:52:44,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 156. [2023-11-26 11:52:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 129 states have (on average 1.2790697674418605) internal successors, (165), 129 states have internal predecessors, (165), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-26 11:52:44,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 207 transitions. [2023-11-26 11:52:44,994 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 207 transitions. Word has length 151 [2023-11-26 11:52:44,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:44,994 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 207 transitions. [2023-11-26 11:52:44,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 5 states have call successors, (41), 3 states have call predecessors, (41), 7 states have return successors, (42), 4 states have call predecessors, (42), 5 states have call successors, (42) [2023-11-26 11:52:44,995 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 207 transitions. [2023-11-26 11:52:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-26 11:52:44,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:44,997 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:45,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:45,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:52:45,204 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:45,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:45,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1712379584, now seen corresponding path program 1 times [2023-11-26 11:52:45,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:45,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991991134] [2023-11-26 11:52:45,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:45,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:45,247 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:45,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172900886] [2023-11-26 11:52:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:45,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:45,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:45,265 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:45,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:52:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:45,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-26 11:52:45,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 533 proven. 198 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-26 11:52:57,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-26 11:53:05,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:05,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991991134] [2023-11-26 11:53:05,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:05,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172900886] [2023-11-26 11:53:05,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172900886] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:05,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:53:05,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [34] total 43 [2023-11-26 11:53:05,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467375243] [2023-11-26 11:53:05,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:05,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:53:05,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:05,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:53:05,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1455, Unknown=0, NotChecked=0, Total=1806 [2023-11-26 11:53:05,136 INFO L87 Difference]: Start difference. First operand 156 states and 207 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:53:11,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:11,275 INFO L93 Difference]: Finished difference Result 596 states and 792 transitions. [2023-11-26 11:53:11,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-26 11:53:11,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 153 [2023-11-26 11:53:11,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:11,279 INFO L225 Difference]: With dead ends: 596 [2023-11-26 11:53:11,279 INFO L226 Difference]: Without dead ends: 441 [2023-11-26 11:53:11,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=628, Invalid=3154, Unknown=0, NotChecked=0, Total=3782 [2023-11-26 11:53:11,282 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 560 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:11,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 523 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-26 11:53:11,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-11-26 11:53:11,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 219. [2023-11-26 11:53:11,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 192 states have (on average 1.3072916666666667) internal successors, (251), 192 states have internal predecessors, (251), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-26 11:53:11,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 293 transitions. [2023-11-26 11:53:11,313 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 293 transitions. Word has length 153 [2023-11-26 11:53:11,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:11,313 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 293 transitions. [2023-11-26 11:53:11,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:53:11,314 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 293 transitions. [2023-11-26 11:53:11,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-26 11:53:11,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:11,316 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:11,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-26 11:53:11,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:53:11,524 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:11,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:11,525 INFO L85 PathProgramCache]: Analyzing trace with hash 124031682, now seen corresponding path program 1 times [2023-11-26 11:53:11,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:11,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531969927] [2023-11-26 11:53:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:11,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:11,561 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:11,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661849509] [2023-11-26 11:53:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:11,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:11,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:11,562 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:11,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0a5173-c37c-4efc-9d51-06cff190f9b5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:53:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:11,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:53:11,716 INFO L285 TraceCheckSpWp]: Computing forward predicates...