./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-78.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/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_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-78.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/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_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/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 cb1c4114bfb0472867e70fb2c8f5009a549c16b521c64e275202f167415d6d46 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:43:58,734 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:43:58,869 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:43:58,877 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:43:58,878 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:43:58,925 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:43:58,927 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:43:58,928 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:43:58,929 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:43:58,935 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:43:58,935 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:43:58,937 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:43:58,938 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:43:58,940 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:43:58,940 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:43:58,941 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:43:58,942 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:43:58,942 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:43:58,943 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:43:58,944 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:43:58,944 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:43:58,945 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:43:58,945 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:43:58,946 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:43:58,946 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:43:58,947 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:43:58,947 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:43:58,948 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:43:58,949 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:43:58,949 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:43:58,951 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:43:58,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:43:58,952 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:43:58,952 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:43:58,952 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:43:58,953 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:43:58,953 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:43:58,953 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:43:58,954 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:43:58,954 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:43:58,954 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:43:58,955 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:43:58,955 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_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb1c4114bfb0472867e70fb2c8f5009a549c16b521c64e275202f167415d6d46 [2023-11-26 11:43:59,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:43:59,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:43:59,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:43:59,288 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:43:59,289 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:43:59,290 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-78.i [2023-11-26 11:44:02,483 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:44:02,843 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:44:02,845 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-78.i [2023-11-26 11:44:02,865 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/data/40e58a5f2/89688eea4a7d402196ddc1af8bc6dc0d/FLAG2e0397ab6 [2023-11-26 11:44:02,884 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/data/40e58a5f2/89688eea4a7d402196ddc1af8bc6dc0d [2023-11-26 11:44:02,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:44:02,891 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:44:02,894 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:44:02,895 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:44:02,901 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:44:02,902 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:44:02" (1/1) ... [2023-11-26 11:44:02,903 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec82bf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:02, skipping insertion in model container [2023-11-26 11:44:02,903 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:44:02" (1/1) ... [2023-11-26 11:44:02,988 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:44:03,147 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_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-78.i[916,929] [2023-11-26 11:44:03,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:44:03,499 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:44:03,512 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_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-78.i[916,929] [2023-11-26 11:44:03,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:44:03,775 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:44:03,776 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:03 WrapperNode [2023-11-26 11:44:03,776 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:44:03,777 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:44:03,778 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:44:03,778 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:44:03,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:03" (1/1) ... [2023-11-26 11:44:03,817 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:03" (1/1) ... [2023-11-26 11:44:03,938 INFO L138 Inliner]: procedures = 26, calls = 81, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 789 [2023-11-26 11:44:03,939 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:44:03,939 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:44:03,940 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:44:03,940 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:44:03,952 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:03" (1/1) ... [2023-11-26 11:44:03,952 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:03" (1/1) ... [2023-11-26 11:44:03,980 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:03" (1/1) ... [2023-11-26 11:44:04,045 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 11:44:04,047 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:03" (1/1) ... [2023-11-26 11:44:04,047 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:03" (1/1) ... [2023-11-26 11:44:04,102 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:03" (1/1) ... [2023-11-26 11:44:04,126 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:03" (1/1) ... [2023-11-26 11:44:04,142 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:03" (1/1) ... [2023-11-26 11:44:04,162 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:03" (1/1) ... [2023-11-26 11:44:04,206 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:44:04,207 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:44:04,207 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:44:04,207 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:44:04,208 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:03" (1/1) ... [2023-11-26 11:44:04,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:44:04,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:04,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:44:04,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:44:04,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:44:04,289 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:44:04,289 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:44:04,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:44:04,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:44:04,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:44:04,451 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:44:04,453 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:44:06,098 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:44:06,164 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:44:06,164 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:44:06,165 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:44:06 BoogieIcfgContainer [2023-11-26 11:44:06,165 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:44:06,168 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:44:06,168 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:44:06,171 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:44:06,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:44:02" (1/3) ... [2023-11-26 11:44:06,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e86211b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:44:06, skipping insertion in model container [2023-11-26 11:44:06,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:03" (2/3) ... [2023-11-26 11:44:06,173 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e86211b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:44:06, skipping insertion in model container [2023-11-26 11:44:06,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:44:06" (3/3) ... [2023-11-26 11:44:06,175 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-78.i [2023-11-26 11:44:06,197 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:44:06,197 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:44:06,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:44:06,287 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;@587a420c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:44:06,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:44:06,294 INFO L276 IsEmpty]: Start isEmpty. Operand has 297 states, 226 states have (on average 1.5973451327433628) internal successors, (361), 227 states have internal predecessors, (361), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-26 11:44:06,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-26 11:44:06,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:06,347 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:06,348 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:06,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:06,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2066071846, now seen corresponding path program 1 times [2023-11-26 11:44:06,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:06,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410486431] [2023-11-26 11:44:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:06,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:06,798 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:06,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157926013] [2023-11-26 11:44:06,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:06,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:06,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:06,804 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:06,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:44:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:07,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:44:07,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:44:08,269 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:08,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:08,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410486431] [2023-11-26 11:44:08,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:08,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157926013] [2023-11-26 11:44:08,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157926013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:08,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:08,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:44:08,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556978340] [2023-11-26 11:44:08,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:08,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:08,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:08,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:08,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:08,318 INFO L87 Difference]: Start difference. First operand has 297 states, 226 states have (on average 1.5973451327433628) internal successors, (361), 227 states have internal predecessors, (361), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:44:08,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:08,863 INFO L93 Difference]: Finished difference Result 886 states and 1626 transitions. [2023-11-26 11:44:08,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:08,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 473 [2023-11-26 11:44:08,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:08,899 INFO L225 Difference]: With dead ends: 886 [2023-11-26 11:44:08,899 INFO L226 Difference]: Without dead ends: 590 [2023-11-26 11:44:08,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 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 11:44:08,913 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 421 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 1440 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:08,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 1440 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:44:08,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-11-26 11:44:09,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 560. [2023-11-26 11:44:09,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 421 states have (on average 1.5795724465558194) internal successors, (665), 421 states have internal predecessors, (665), 136 states have call successors, (136), 2 states have call predecessors, (136), 2 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2023-11-26 11:44:09,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 937 transitions. [2023-11-26 11:44:09,101 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 937 transitions. Word has length 473 [2023-11-26 11:44:09,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:09,104 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 937 transitions. [2023-11-26 11:44:09,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:44:09,105 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 937 transitions. [2023-11-26 11:44:09,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-26 11:44:09,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:09,122 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:09,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:09,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:09,332 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:09,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:09,333 INFO L85 PathProgramCache]: Analyzing trace with hash -214712508, now seen corresponding path program 1 times [2023-11-26 11:44:09,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:09,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705772250] [2023-11-26 11:44:09,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:09,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:09,497 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:09,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293579017] [2023-11-26 11:44:09,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:09,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:09,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:09,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:09,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:44:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:09,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:44:09,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:44:10,102 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:10,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:10,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705772250] [2023-11-26 11:44:10,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:10,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293579017] [2023-11-26 11:44:10,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293579017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:10,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:10,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:44:10,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043740591] [2023-11-26 11:44:10,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:10,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:44:10,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:10,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:44:10,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:44:10,108 INFO L87 Difference]: Start difference. First operand 560 states and 937 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:44:10,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:10,298 INFO L93 Difference]: Finished difference Result 1233 states and 2072 transitions. [2023-11-26 11:44:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:44:10,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 474 [2023-11-26 11:44:10,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:10,308 INFO L225 Difference]: With dead ends: 1233 [2023-11-26 11:44:10,308 INFO L226 Difference]: Without dead ends: 906 [2023-11-26 11:44:10,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 472 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 11:44:10,311 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 288 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:10,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 998 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:44:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2023-11-26 11:44:10,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 903. [2023-11-26 11:44:10,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 736 states have (on average 1.625) internal successors, (1196), 737 states have internal predecessors, (1196), 163 states have call successors, (163), 3 states have call predecessors, (163), 3 states have return successors, (163), 162 states have call predecessors, (163), 163 states have call successors, (163) [2023-11-26 11:44:10,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1522 transitions. [2023-11-26 11:44:10,420 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1522 transitions. Word has length 474 [2023-11-26 11:44:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:10,422 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1522 transitions. [2023-11-26 11:44:10,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:44:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1522 transitions. [2023-11-26 11:44:10,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-26 11:44:10,434 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:10,434 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:10,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:10,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:10,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:10,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:10,644 INFO L85 PathProgramCache]: Analyzing trace with hash 602935942, now seen corresponding path program 1 times [2023-11-26 11:44:10,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:10,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679498603] [2023-11-26 11:44:10,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:10,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:10,766 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:10,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801947924] [2023-11-26 11:44:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:10,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:10,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:10,776 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:10,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:44:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:11,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:44:11,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:44:12,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:12,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:12,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679498603] [2023-11-26 11:44:12,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:12,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801947924] [2023-11-26 11:44:12,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801947924] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:12,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:12,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:44:12,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119703994] [2023-11-26 11:44:12,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:12,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:44:12,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:12,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:44:12,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:44:12,932 INFO L87 Difference]: Start difference. First operand 903 states and 1522 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:44:13,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:13,890 INFO L93 Difference]: Finished difference Result 3431 states and 5815 transitions. [2023-11-26 11:44:13,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:44:13,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 474 [2023-11-26 11:44:13,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:13,917 INFO L225 Difference]: With dead ends: 3431 [2023-11-26 11:44:13,917 INFO L226 Difference]: Without dead ends: 2650 [2023-11-26 11:44:13,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:44:13,923 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 1852 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1852 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:13,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1852 Valid, 1711 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 11:44:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2023-11-26 11:44:14,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2365. [2023-11-26 11:44:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2004 states have (on average 1.625748502994012) internal successors, (3258), 2007 states have internal predecessors, (3258), 353 states have call successors, (353), 7 states have call predecessors, (353), 7 states have return successors, (353), 350 states have call predecessors, (353), 353 states have call successors, (353) [2023-11-26 11:44:14,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 3964 transitions. [2023-11-26 11:44:14,194 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 3964 transitions. Word has length 474 [2023-11-26 11:44:14,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:14,196 INFO L495 AbstractCegarLoop]: Abstraction has 2365 states and 3964 transitions. [2023-11-26 11:44:14,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:44:14,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 3964 transitions. [2023-11-26 11:44:14,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-26 11:44:14,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:14,211 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:14,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:14,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:14,421 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:14,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:14,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1857101605, now seen corresponding path program 1 times [2023-11-26 11:44:14,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:14,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255155201] [2023-11-26 11:44:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:14,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:14,534 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:14,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310012900] [2023-11-26 11:44:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:14,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:14,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:14,536 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:14,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:44:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:14,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:44:14,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:44:16,363 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:16,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:16,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255155201] [2023-11-26 11:44:16,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:16,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310012900] [2023-11-26 11:44:16,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310012900] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:16,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:16,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:44:16,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310156704] [2023-11-26 11:44:16,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:16,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:16,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:16,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:16,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:16,373 INFO L87 Difference]: Start difference. First operand 2365 states and 3964 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:44:16,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:16,540 INFO L93 Difference]: Finished difference Result 3790 states and 6382 transitions. [2023-11-26 11:44:16,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:44:16,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 475 [2023-11-26 11:44:16,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:16,563 INFO L225 Difference]: With dead ends: 3790 [2023-11-26 11:44:16,563 INFO L226 Difference]: Without dead ends: 3077 [2023-11-26 11:44:16,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:16,574 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 563 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:16,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 959 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:44:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2023-11-26 11:44:16,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 3071. [2023-11-26 11:44:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3071 states, 2613 states have (on average 1.6280137772675085) internal successors, (4254), 2617 states have internal predecessors, (4254), 448 states have call successors, (448), 9 states have call predecessors, (448), 9 states have return successors, (448), 444 states have call predecessors, (448), 448 states have call successors, (448) [2023-11-26 11:44:16,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3071 states to 3071 states and 5150 transitions. [2023-11-26 11:44:16,843 INFO L78 Accepts]: Start accepts. Automaton has 3071 states and 5150 transitions. Word has length 475 [2023-11-26 11:44:16,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:16,846 INFO L495 AbstractCegarLoop]: Abstraction has 3071 states and 5150 transitions. [2023-11-26 11:44:16,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:44:16,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3071 states and 5150 transitions. [2023-11-26 11:44:16,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-26 11:44:16,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:16,861 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:16,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:17,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:17,072 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:17,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:17,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2004136605, now seen corresponding path program 1 times [2023-11-26 11:44:17,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:17,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370759851] [2023-11-26 11:44:17,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:17,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:17,195 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:17,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682730505] [2023-11-26 11:44:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:17,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:17,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:17,199 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:17,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:44:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:17,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:44:17,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:44:17,756 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:17,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:17,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370759851] [2023-11-26 11:44:17,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:17,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682730505] [2023-11-26 11:44:17,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682730505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:17,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:17,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:44:17,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674547119] [2023-11-26 11:44:17,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:17,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:17,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:17,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:17,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:17,761 INFO L87 Difference]: Start difference. First operand 3071 states and 5150 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:44:18,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:18,355 INFO L93 Difference]: Finished difference Result 13723 states and 23061 transitions. [2023-11-26 11:44:18,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:44:18,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 475 [2023-11-26 11:44:18,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:18,425 INFO L225 Difference]: With dead ends: 13723 [2023-11-26 11:44:18,425 INFO L226 Difference]: Without dead ends: 10863 [2023-11-26 11:44:18,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 473 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 11:44:18,452 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 1348 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1348 SdHoareTripleChecker+Valid, 2115 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:18,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1348 Valid, 2115 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:44:18,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10863 states. [2023-11-26 11:44:18,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10863 to 6387. [2023-11-26 11:44:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6387 states, 5656 states have (on average 1.643033946251768) internal successors, (9293), 5668 states have internal predecessors, (9293), 712 states have call successors, (712), 18 states have call predecessors, (712), 18 states have return successors, (712), 700 states have call predecessors, (712), 712 states have call successors, (712) [2023-11-26 11:44:19,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6387 states to 6387 states and 10717 transitions. [2023-11-26 11:44:19,042 INFO L78 Accepts]: Start accepts. Automaton has 6387 states and 10717 transitions. Word has length 475 [2023-11-26 11:44:19,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:19,043 INFO L495 AbstractCegarLoop]: Abstraction has 6387 states and 10717 transitions. [2023-11-26 11:44:19,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:44:19,044 INFO L276 IsEmpty]: Start isEmpty. Operand 6387 states and 10717 transitions. [2023-11-26 11:44:19,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-26 11:44:19,053 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:19,054 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:19,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:19,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:19,263 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:19,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:19,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1165043165, now seen corresponding path program 1 times [2023-11-26 11:44:19,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:19,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104939035] [2023-11-26 11:44:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:19,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:19,338 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:19,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877168790] [2023-11-26 11:44:19,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:19,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:19,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:19,340 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:19,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:44:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:19,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:44:19,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4441 proven. 120 refuted. 0 times theorem prover too weak. 4551 trivial. 0 not checked. [2023-11-26 11:44:20,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 81 proven. 120 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-26 11:44:20,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:20,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104939035] [2023-11-26 11:44:20,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:20,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877168790] [2023-11-26 11:44:20,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877168790] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:20,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:44:20,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 11:44:20,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552477310] [2023-11-26 11:44:20,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:20,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:44:20,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:20,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:44:20,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:44:20,702 INFO L87 Difference]: Start difference. First operand 6387 states and 10717 transitions. Second operand has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 3 states have call successors, (108), 2 states have call predecessors, (108), 4 states have return successors, (109), 3 states have call predecessors, (109), 3 states have call successors, (109) [2023-11-26 11:44:21,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:21,463 INFO L93 Difference]: Finished difference Result 8655 states and 14445 transitions. [2023-11-26 11:44:21,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:44:21,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 3 states have call successors, (108), 2 states have call predecessors, (108), 4 states have return successors, (109), 3 states have call predecessors, (109), 3 states have call successors, (109) Word has length 475 [2023-11-26 11:44:21,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:21,500 INFO L225 Difference]: With dead ends: 8655 [2023-11-26 11:44:21,500 INFO L226 Difference]: Without dead ends: 3524 [2023-11-26 11:44:21,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 942 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:44:21,511 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 658 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:21,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 1028 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:44:21,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3524 states. [2023-11-26 11:44:21,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3524 to 3504. [2023-11-26 11:44:21,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3504 states, 2988 states have (on average 1.6198125836680053) internal successors, (4840), 2992 states have internal predecessors, (4840), 496 states have call successors, (496), 19 states have call predecessors, (496), 19 states have return successors, (496), 492 states have call predecessors, (496), 496 states have call successors, (496) [2023-11-26 11:44:21,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3504 states to 3504 states and 5832 transitions. [2023-11-26 11:44:21,845 INFO L78 Accepts]: Start accepts. Automaton has 3504 states and 5832 transitions. Word has length 475 [2023-11-26 11:44:21,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:21,846 INFO L495 AbstractCegarLoop]: Abstraction has 3504 states and 5832 transitions. [2023-11-26 11:44:21,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 3 states have call successors, (108), 2 states have call predecessors, (108), 4 states have return successors, (109), 3 states have call predecessors, (109), 3 states have call successors, (109) [2023-11-26 11:44:21,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3504 states and 5832 transitions. [2023-11-26 11:44:21,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-11-26 11:44:21,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:21,855 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:21,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:22,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:44:22,064 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:22,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:22,064 INFO L85 PathProgramCache]: Analyzing trace with hash 221828496, now seen corresponding path program 1 times [2023-11-26 11:44:22,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:22,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409422954] [2023-11-26 11:44:22,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:22,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:22,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:22,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241707181] [2023-11-26 11:44:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:22,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:22,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:22,159 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:22,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:44:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:22,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:44:22,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4513 proven. 84 refuted. 0 times theorem prover too weak. 4515 trivial. 0 not checked. [2023-11-26 11:44:23,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 117 proven. 84 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-26 11:44:23,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:23,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409422954] [2023-11-26 11:44:23,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:23,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241707181] [2023-11-26 11:44:23,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241707181] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:23,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:44:23,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:44:23,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426182523] [2023-11-26 11:44:23,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:23,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:44:23,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:23,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:44:23,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:44:23,592 INFO L87 Difference]: Start difference. First operand 3504 states and 5832 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) [2023-11-26 11:44:24,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:24,552 INFO L93 Difference]: Finished difference Result 4814 states and 7962 transitions. [2023-11-26 11:44:24,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:44:24,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) Word has length 476 [2023-11-26 11:44:24,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:24,565 INFO L225 Difference]: With dead ends: 4814 [2023-11-26 11:44:24,566 INFO L226 Difference]: Without dead ends: 2018 [2023-11-26 11:44:24,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 944 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:44:24,574 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 342 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:24,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 1246 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:44:24,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2023-11-26 11:44:24,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 2006. [2023-11-26 11:44:24,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 1649 states have (on average 1.583383869011522) internal successors, (2611), 1649 states have internal predecessors, (2611), 340 states have call successors, (340), 16 states have call predecessors, (340), 16 states have return successors, (340), 340 states have call predecessors, (340), 340 states have call successors, (340) [2023-11-26 11:44:24,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 3291 transitions. [2023-11-26 11:44:24,760 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 3291 transitions. Word has length 476 [2023-11-26 11:44:24,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:24,762 INFO L495 AbstractCegarLoop]: Abstraction has 2006 states and 3291 transitions. [2023-11-26 11:44:24,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) [2023-11-26 11:44:24,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 3291 transitions. [2023-11-26 11:44:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-11-26 11:44:24,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:24,768 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:24,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-26 11:44:24,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:44:24,977 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:24,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:24,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1109891118, now seen corresponding path program 1 times [2023-11-26 11:44:24,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:24,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789976566] [2023-11-26 11:44:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:24,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:25,052 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:25,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162466889] [2023-11-26 11:44:25,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:25,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:25,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:25,054 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:25,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:44:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:25,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:44:25,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:44:25,668 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:25,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:25,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789976566] [2023-11-26 11:44:25,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:25,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162466889] [2023-11-26 11:44:25,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162466889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:25,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:25,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:44:25,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525329036] [2023-11-26 11:44:25,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:25,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:25,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:25,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:25,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:25,672 INFO L87 Difference]: Start difference. First operand 2006 states and 3291 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:44:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:26,386 INFO L93 Difference]: Finished difference Result 6052 states and 9986 transitions. [2023-11-26 11:44:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:26,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 476 [2023-11-26 11:44:26,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:26,413 INFO L225 Difference]: With dead ends: 6052 [2023-11-26 11:44:26,413 INFO L226 Difference]: Without dead ends: 4134 [2023-11-26 11:44:26,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 474 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 11:44:26,421 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 837 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:26,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 1293 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:44:26,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2023-11-26 11:44:26,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 3916. [2023-11-26 11:44:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3395 states have (on average 1.5994108983799706) internal successors, (5430), 3399 states have internal predecessors, (5430), 496 states have call successors, (496), 24 states have call predecessors, (496), 24 states have return successors, (496), 492 states have call predecessors, (496), 496 states have call successors, (496) [2023-11-26 11:44:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 6422 transitions. [2023-11-26 11:44:26,698 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 6422 transitions. Word has length 476 [2023-11-26 11:44:26,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:26,699 INFO L495 AbstractCegarLoop]: Abstraction has 3916 states and 6422 transitions. [2023-11-26 11:44:26,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:44:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 6422 transitions. [2023-11-26 11:44:26,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-11-26 11:44:26,709 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:26,710 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:26,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:26,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:44:26,919 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:26,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:26,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1350130864, now seen corresponding path program 1 times [2023-11-26 11:44:26,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:26,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086455467] [2023-11-26 11:44:26,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:26,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:26,994 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:26,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608926272] [2023-11-26 11:44:26,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:26,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:26,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:26,996 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:27,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:44:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:27,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:44:27,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:44:27,616 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:27,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:27,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086455467] [2023-11-26 11:44:27,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:27,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608926272] [2023-11-26 11:44:27,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608926272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:27,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:27,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:44:27,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762089448] [2023-11-26 11:44:27,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:27,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:44:27,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:27,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:44:27,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:44:27,621 INFO L87 Difference]: Start difference. First operand 3916 states and 6422 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:44:27,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:27,898 INFO L93 Difference]: Finished difference Result 7530 states and 12325 transitions. [2023-11-26 11:44:27,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:44:27,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 476 [2023-11-26 11:44:27,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:27,915 INFO L225 Difference]: With dead ends: 7530 [2023-11-26 11:44:27,915 INFO L226 Difference]: Without dead ends: 4196 [2023-11-26 11:44:27,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 474 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 11:44:27,924 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 419 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:27,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 1100 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:44:27,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2023-11-26 11:44:28,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 3410. [2023-11-26 11:44:28,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 2971 states have (on average 1.5913833726018176) internal successors, (4728), 2973 states have internal predecessors, (4728), 418 states have call successors, (418), 20 states have call predecessors, (418), 20 states have return successors, (418), 416 states have call predecessors, (418), 418 states have call successors, (418) [2023-11-26 11:44:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 5564 transitions. [2023-11-26 11:44:28,224 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 5564 transitions. Word has length 476 [2023-11-26 11:44:28,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:28,225 INFO L495 AbstractCegarLoop]: Abstraction has 3410 states and 5564 transitions. [2023-11-26 11:44:28,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:44:28,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 5564 transitions. [2023-11-26 11:44:28,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2023-11-26 11:44:28,232 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:28,233 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:28,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:28,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:28,447 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:28,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash 102372759, now seen corresponding path program 1 times [2023-11-26 11:44:28,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:28,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068231097] [2023-11-26 11:44:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:28,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:28,551 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:28,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632908915] [2023-11-26 11:44:28,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:28,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:28,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:28,553 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:28,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:44:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:29,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:44:29,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:44:29,137 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:29,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:29,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068231097] [2023-11-26 11:44:29,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:29,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632908915] [2023-11-26 11:44:29,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632908915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:29,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:29,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:44:29,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245326621] [2023-11-26 11:44:29,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:29,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:29,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:29,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:29,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:29,141 INFO L87 Difference]: Start difference. First operand 3410 states and 5564 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:44:29,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:29,703 INFO L93 Difference]: Finished difference Result 11830 states and 19381 transitions. [2023-11-26 11:44:29,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:44:29,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 477 [2023-11-26 11:44:29,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:29,730 INFO L225 Difference]: With dead ends: 11830 [2023-11-26 11:44:29,730 INFO L226 Difference]: Without dead ends: 8652 [2023-11-26 11:44:29,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 475 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 11:44:29,740 INFO L413 NwaCegarLoop]: 476 mSDtfsCounter, 1301 mSDsluCounter, 1433 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 1909 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:29,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1301 Valid, 1909 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:44:29,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8652 states. [2023-11-26 11:44:30,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8652 to 8370. [2023-11-26 11:44:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8370 states, 7522 states have (on average 1.6014357883541612) internal successors, (12046), 7534 states have internal predecessors, (12046), 808 states have call successors, (808), 39 states have call predecessors, (808), 39 states have return successors, (808), 796 states have call predecessors, (808), 808 states have call successors, (808) [2023-11-26 11:44:30,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8370 states to 8370 states and 13662 transitions. [2023-11-26 11:44:30,438 INFO L78 Accepts]: Start accepts. Automaton has 8370 states and 13662 transitions. Word has length 477 [2023-11-26 11:44:30,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:30,439 INFO L495 AbstractCegarLoop]: Abstraction has 8370 states and 13662 transitions. [2023-11-26 11:44:30,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:44:30,439 INFO L276 IsEmpty]: Start isEmpty. Operand 8370 states and 13662 transitions. [2023-11-26 11:44:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2023-11-26 11:44:30,449 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:30,450 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:30,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:30,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:44:30,659 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:30,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:30,659 INFO L85 PathProgramCache]: Analyzing trace with hash 536101845, now seen corresponding path program 1 times [2023-11-26 11:44:30,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:30,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276470907] [2023-11-26 11:44:30,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:30,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:30,746 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:30,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200839148] [2023-11-26 11:44:30,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:30,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:30,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:30,748 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:30,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:44:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:31,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:44:31,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:44:32,080 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:32,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:32,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276470907] [2023-11-26 11:44:32,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:32,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200839148] [2023-11-26 11:44:32,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200839148] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:32,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:32,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:44:32,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924714501] [2023-11-26 11:44:32,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:32,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:44:32,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:32,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:44:32,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:44:32,085 INFO L87 Difference]: Start difference. First operand 8370 states and 13662 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:44:33,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:33,463 INFO L93 Difference]: Finished difference Result 21888 states and 35600 transitions. [2023-11-26 11:44:33,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:44:33,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 477 [2023-11-26 11:44:33,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:33,500 INFO L225 Difference]: With dead ends: 21888 [2023-11-26 11:44:33,501 INFO L226 Difference]: Without dead ends: 13850 [2023-11-26 11:44:33,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:44:33,518 INFO L413 NwaCegarLoop]: 634 mSDtfsCounter, 1643 mSDsluCounter, 2311 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1643 SdHoareTripleChecker+Valid, 2945 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:33,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1643 Valid, 2945 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:44:33,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13850 states. [2023-11-26 11:44:34,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13850 to 11100. [2023-11-26 11:44:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11100 states, 10251 states have (on average 1.6075504828797191) internal successors, (16479), 10263 states have internal predecessors, (16479), 808 states have call successors, (808), 40 states have call predecessors, (808), 40 states have return successors, (808), 796 states have call predecessors, (808), 808 states have call successors, (808) [2023-11-26 11:44:34,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11100 states to 11100 states and 18095 transitions. [2023-11-26 11:44:34,324 INFO L78 Accepts]: Start accepts. Automaton has 11100 states and 18095 transitions. Word has length 477 [2023-11-26 11:44:34,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:34,325 INFO L495 AbstractCegarLoop]: Abstraction has 11100 states and 18095 transitions. [2023-11-26 11:44:34,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:44:34,325 INFO L276 IsEmpty]: Start isEmpty. Operand 11100 states and 18095 transitions. [2023-11-26 11:44:34,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2023-11-26 11:44:34,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:34,342 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:34,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:34,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:44:34,551 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:34,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:34,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1752255571, now seen corresponding path program 1 times [2023-11-26 11:44:34,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:34,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630405383] [2023-11-26 11:44:34,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:34,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:34,676 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:34,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078441738] [2023-11-26 11:44:34,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:34,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:34,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:34,684 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:34,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:44:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:35,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:44:35,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4441 proven. 120 refuted. 0 times theorem prover too weak. 4551 trivial. 0 not checked. [2023-11-26 11:44:36,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 81 proven. 120 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-26 11:44:37,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:37,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630405383] [2023-11-26 11:44:37,049 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:37,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078441738] [2023-11-26 11:44:37,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078441738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:37,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:44:37,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-26 11:44:37,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799041510] [2023-11-26 11:44:37,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:37,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:44:37,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:37,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:44:37,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:44:37,054 INFO L87 Difference]: Start difference. First operand 11100 states and 18095 transitions. Second operand has 12 states, 12 states have (on average 17.166666666666668) internal successors, (206), 12 states have internal predecessors, (206), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-11-26 11:44:39,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:39,511 INFO L93 Difference]: Finished difference Result 27972 states and 45628 transitions. [2023-11-26 11:44:39,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:44:39,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 17.166666666666668) internal successors, (206), 12 states have internal predecessors, (206), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) Word has length 477 [2023-11-26 11:44:39,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:39,565 INFO L225 Difference]: With dead ends: 27972 [2023-11-26 11:44:39,566 INFO L226 Difference]: Without dead ends: 17032 [2023-11-26 11:44:39,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 944 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:44:39,590 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 2809 mSDsluCounter, 2052 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2876 SdHoareTripleChecker+Valid, 2474 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:39,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2876 Valid, 2474 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-26 11:44:39,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17032 states. [2023-11-26 11:44:40,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17032 to 11132. [2023-11-26 11:44:40,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11132 states, 10283 states have (on average 1.60468734805018) internal successors, (16501), 10295 states have internal predecessors, (16501), 808 states have call successors, (808), 40 states have call predecessors, (808), 40 states have return successors, (808), 796 states have call predecessors, (808), 808 states have call successors, (808) [2023-11-26 11:44:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11132 states to 11132 states and 18117 transitions. [2023-11-26 11:44:40,556 INFO L78 Accepts]: Start accepts. Automaton has 11132 states and 18117 transitions. Word has length 477 [2023-11-26 11:44:40,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:40,557 INFO L495 AbstractCegarLoop]: Abstraction has 11132 states and 18117 transitions. [2023-11-26 11:44:40,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.166666666666668) internal successors, (206), 12 states have internal predecessors, (206), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-11-26 11:44:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 11132 states and 18117 transitions. [2023-11-26 11:44:40,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2023-11-26 11:44:40,574 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:40,574 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:40,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:40,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:44:40,783 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:40,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:40,784 INFO L85 PathProgramCache]: Analyzing trace with hash -126875375, now seen corresponding path program 1 times [2023-11-26 11:44:40,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:40,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675397998] [2023-11-26 11:44:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:40,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:40,858 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:44:40,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127997352] [2023-11-26 11:44:40,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:40,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:40,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:40,860 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:40,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2b5060-a6cc-45ca-b5b5-d5f8580420de/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:44:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:41,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:44:41,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 1876 proven. 36 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2023-11-26 11:44:42,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 180 proven. 21 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-26 11:44:42,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:42,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675397998] [2023-11-26 11:44:42,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:44:42,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127997352] [2023-11-26 11:44:42,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127997352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:42,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:44:42,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2023-11-26 11:44:42,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920120683] [2023-11-26 11:44:42,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:42,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:44:42,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:42,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:44:42,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:44:42,470 INFO L87 Difference]: Start difference. First operand 11132 states and 18117 transitions. Second operand has 15 states, 15 states have (on average 13.133333333333333) internal successors, (197), 14 states have internal predecessors, (197), 4 states have call successors, (75), 3 states have call predecessors, (75), 5 states have return successors, (76), 4 states have call predecessors, (76), 4 states have call successors, (76)