./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-53.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-53.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7cb9b30dbc4292cb9b2a5d2ba3cd92c29fce78cf71613b08638f29c6cc332119 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:03:08,950 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:03:09,065 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:03:09,075 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:03:09,076 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:03:09,113 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:03:09,114 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:03:09,115 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:03:09,116 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:03:09,120 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:03:09,122 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:03:09,122 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:03:09,123 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:03:09,124 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:03:09,125 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:03:09,125 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:03:09,126 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:03:09,126 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:03:09,126 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:03:09,127 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:03:09,127 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:03:09,128 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:03:09,128 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:03:09,128 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:03:09,129 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:03:09,130 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:03:09,130 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:03:09,131 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:03:09,131 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:03:09,131 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:03:09,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:03:09,133 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:03:09,133 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:03:09,133 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:03:09,134 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:03:09,134 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:03:09,134 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:03:09,134 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:03:09,134 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:03:09,135 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_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cb9b30dbc4292cb9b2a5d2ba3cd92c29fce78cf71613b08638f29c6cc332119 [2023-11-12 02:03:09,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:03:09,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:03:09,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:03:09,456 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:03:09,461 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:03:09,463 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-53.i [2023-11-12 02:03:12,454 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:03:12,883 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:03:12,884 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-53.i [2023-11-12 02:03:12,900 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/data/befb7dcd5/9af3f3d5259b4adba994ad21d4002438/FLAG06f24d44b [2023-11-12 02:03:12,918 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/data/befb7dcd5/9af3f3d5259b4adba994ad21d4002438 [2023-11-12 02:03:12,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:03:12,927 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:03:12,930 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:03:12,930 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:03:12,936 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:03:12,937 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:03:12" (1/1) ... [2023-11-12 02:03:12,938 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77d756e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:12, skipping insertion in model container [2023-11-12 02:03:12,938 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:03:12" (1/1) ... [2023-11-12 02:03:13,015 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:03:13,215 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_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-53.i[916,929] [2023-11-12 02:03:13,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:03:13,462 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:03:13,475 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_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-53.i[916,929] [2023-11-12 02:03:13,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:03:13,626 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:03:13,626 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13 WrapperNode [2023-11-12 02:03:13,626 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:03:13,628 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:03:13,628 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:03:13,628 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:03:13,637 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,664 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,751 INFO L138 Inliner]: procedures = 26, calls = 58, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 398 [2023-11-12 02:03:13,751 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:03:13,752 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:03:13,753 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:03:13,753 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:03:13,763 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,792 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,794 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,834 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,850 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,871 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,879 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,901 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:03:13,905 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:03:13,905 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:03:13,906 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:03:13,907 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:03:13,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:13,949 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:03:13,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:03:13,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:03:13,998 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:03:13,998 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:03:13,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:03:13,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:03:13,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:03:14,142 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:03:14,144 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:03:15,104 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:03:15,113 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:03:15,114 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:03:15,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:03:15 BoogieIcfgContainer [2023-11-12 02:03:15,115 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:03:15,118 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:03:15,118 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:03:15,121 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:03:15,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:03:12" (1/3) ... [2023-11-12 02:03:15,123 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f986a92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:03:15, skipping insertion in model container [2023-11-12 02:03:15,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (2/3) ... [2023-11-12 02:03:15,123 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f986a92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:03:15, skipping insertion in model container [2023-11-12 02:03:15,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:03:15" (3/3) ... [2023-11-12 02:03:15,125 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-53.i [2023-11-12 02:03:15,145 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:03:15,145 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:03:15,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:03:15,217 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;@292c35c6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:03:15,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:03:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 117 states have (on average 1.4957264957264957) internal successors, (175), 118 states have internal predecessors, (175), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-12 02:03:15,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2023-11-12 02:03:15,248 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:15,249 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:15,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:15,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:15,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1501342749, now seen corresponding path program 1 times [2023-11-12 02:03:15,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:15,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488013218] [2023-11-12 02:03:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:15,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:15,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:15,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488013218] [2023-11-12 02:03:15,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:03:15,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156965570] [2023-11-12 02:03:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:15,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:15,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:15,713 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:15,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:03:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:16,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:03:16,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2023-11-12 02:03:16,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:03:16,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156965570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:03:16,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:03:16,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:03:16,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420236893] [2023-11-12 02:03:16,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:03:16,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:03:16,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:03:16,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:03:16,178 INFO L87 Difference]: Start difference. First operand has 165 states, 117 states have (on average 1.4957264957264957) internal successors, (175), 118 states have internal predecessors, (175), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) Second operand has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) [2023-11-12 02:03:16,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:03:16,243 INFO L93 Difference]: Finished difference Result 321 states and 565 transitions. [2023-11-12 02:03:16,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:03:16,245 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) Word has length 305 [2023-11-12 02:03:16,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:03:16,254 INFO L225 Difference]: With dead ends: 321 [2023-11-12 02:03:16,255 INFO L226 Difference]: Without dead ends: 159 [2023-11-12 02:03:16,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:03:16,264 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:03:16,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:03:16,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-12 02:03:16,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2023-11-12 02:03:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 112 states have (on average 1.4553571428571428) internal successors, (163), 112 states have internal predecessors, (163), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-12 02:03:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 253 transitions. [2023-11-12 02:03:16,333 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 253 transitions. Word has length 305 [2023-11-12 02:03:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:03:16,334 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 253 transitions. [2023-11-12 02:03:16,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) [2023-11-12 02:03:16,334 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 253 transitions. [2023-11-12 02:03:16,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2023-11-12 02:03:16,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:16,342 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:16,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:16,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:16,550 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:16,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:16,551 INFO L85 PathProgramCache]: Analyzing trace with hash -59060379, now seen corresponding path program 1 times [2023-11-12 02:03:16,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:16,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35740059] [2023-11-12 02:03:16,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:16,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:16,748 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:03:16,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568164081] [2023-11-12 02:03:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:16,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:16,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:16,754 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:16,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:03:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:17,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:03:17,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-12 02:03:17,235 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:03:17,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:17,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35740059] [2023-11-12 02:03:17,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:03:17,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568164081] [2023-11-12 02:03:17,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568164081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:03:17,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:03:17,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:03:17,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556353215] [2023-11-12 02:03:17,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:03:17,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:03:17,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:17,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:03:17,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:03:17,243 INFO L87 Difference]: Start difference. First operand 159 states and 253 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:03:17,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:03:17,366 INFO L93 Difference]: Finished difference Result 460 states and 733 transitions. [2023-11-12 02:03:17,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:03:17,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 305 [2023-11-12 02:03:17,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:03:17,375 INFO L225 Difference]: With dead ends: 460 [2023-11-12 02:03:17,375 INFO L226 Difference]: Without dead ends: 304 [2023-11-12 02:03:17,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:03:17,379 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 229 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:03:17,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 693 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:03:17,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-12 02:03:17,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 177. [2023-11-12 02:03:17,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 130 states have (on average 1.4692307692307693) internal successors, (191), 130 states have internal predecessors, (191), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-12 02:03:17,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 281 transitions. [2023-11-12 02:03:17,421 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 281 transitions. Word has length 305 [2023-11-12 02:03:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:03:17,424 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 281 transitions. [2023-11-12 02:03:17,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:03:17,424 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 281 transitions. [2023-11-12 02:03:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2023-11-12 02:03:17,431 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:17,431 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:17,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 02:03:17,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:17,632 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:17,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:17,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2110427547, now seen corresponding path program 1 times [2023-11-12 02:03:17,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:17,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001046242] [2023-11-12 02:03:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:17,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:17,762 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:03:17,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519944962] [2023-11-12 02:03:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:17,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:17,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:17,775 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:17,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:03:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:18,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:03:18,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1892 proven. 48 refuted. 0 times theorem prover too weak. 2020 trivial. 0 not checked. [2023-11-12 02:03:18,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 84 proven. 48 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-12 02:03:18,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:18,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001046242] [2023-11-12 02:03:18,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:03:18,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519944962] [2023-11-12 02:03:18,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519944962] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:03:18,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:03:18,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:03:18,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845627311] [2023-11-12 02:03:18,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:18,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:03:18,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:18,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:03:18,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:03:18,635 INFO L87 Difference]: Start difference. First operand 177 states and 281 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 2 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-12 02:03:19,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:03:19,153 INFO L93 Difference]: Finished difference Result 357 states and 564 transitions. [2023-11-12 02:03:19,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:03:19,155 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 2 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) Word has length 305 [2023-11-12 02:03:19,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:03:19,166 INFO L225 Difference]: With dead ends: 357 [2023-11-12 02:03:19,166 INFO L226 Difference]: Without dead ends: 183 [2023-11-12 02:03:19,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 602 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:03:19,172 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 465 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:03:19,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 513 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:03:19,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-12 02:03:19,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2023-11-12 02:03:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 133 states have (on average 1.4511278195488722) internal successors, (193), 133 states have internal predecessors, (193), 45 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-12 02:03:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 283 transitions. [2023-11-12 02:03:19,228 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 283 transitions. Word has length 305 [2023-11-12 02:03:19,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:03:19,230 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 283 transitions. [2023-11-12 02:03:19,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 2 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-12 02:03:19,231 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 283 transitions. [2023-11-12 02:03:19,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-12 02:03:19,239 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:19,239 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:19,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:19,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-12 02:03:19,447 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:19,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:19,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1305686533, now seen corresponding path program 1 times [2023-11-12 02:03:19,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:19,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556557971] [2023-11-12 02:03:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:19,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:19,520 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:03:19,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008954870] [2023-11-12 02:03:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:19,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:19,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:19,523 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:19,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:03:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:19,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:03:19,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-12 02:03:20,278 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:03:20,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:20,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556557971] [2023-11-12 02:03:20,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:03:20,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008954870] [2023-11-12 02:03:20,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008954870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:03:20,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:03:20,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:03:20,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141432458] [2023-11-12 02:03:20,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:03:20,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:03:20,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:20,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:03:20,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:03:20,283 INFO L87 Difference]: Start difference. First operand 181 states and 283 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:03:20,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:03:20,597 INFO L93 Difference]: Finished difference Result 599 states and 940 transitions. [2023-11-12 02:03:20,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:03:20,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 306 [2023-11-12 02:03:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:03:20,603 INFO L225 Difference]: With dead ends: 599 [2023-11-12 02:03:20,603 INFO L226 Difference]: Without dead ends: 421 [2023-11-12 02:03:20,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:03:20,606 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 382 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:03:20,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 1060 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:03:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-11-12 02:03:20,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 357. [2023-11-12 02:03:20,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 262 states have (on average 1.4541984732824427) internal successors, (381), 262 states have internal predecessors, (381), 90 states have call successors, (90), 4 states have call predecessors, (90), 4 states have return successors, (90), 90 states have call predecessors, (90), 90 states have call successors, (90) [2023-11-12 02:03:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 561 transitions. [2023-11-12 02:03:20,667 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 561 transitions. Word has length 306 [2023-11-12 02:03:20,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:03:20,668 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 561 transitions. [2023-11-12 02:03:20,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:03:20,669 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 561 transitions. [2023-11-12 02:03:20,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-12 02:03:20,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:20,675 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:20,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:20,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:20,882 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:20,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:20,883 INFO L85 PathProgramCache]: Analyzing trace with hash 622586169, now seen corresponding path program 1 times [2023-11-12 02:03:20,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:20,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416115474] [2023-11-12 02:03:20,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:20,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:20,959 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:03:20,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143256363] [2023-11-12 02:03:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:20,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:20,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:20,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:20,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:03:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:21,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:03:21,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-12 02:03:22,638 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:03:22,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:22,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416115474] [2023-11-12 02:03:22,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:03:22,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143256363] [2023-11-12 02:03:22,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143256363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:03:22,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:03:22,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:03:22,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532525468] [2023-11-12 02:03:22,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:03:22,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:03:22,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:22,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:03:22,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:03:22,642 INFO L87 Difference]: Start difference. First operand 357 states and 561 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:03:23,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:03:23,164 INFO L93 Difference]: Finished difference Result 894 states and 1407 transitions. [2023-11-12 02:03:23,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:03:23,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 306 [2023-11-12 02:03:23,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:03:23,171 INFO L225 Difference]: With dead ends: 894 [2023-11-12 02:03:23,172 INFO L226 Difference]: Without dead ends: 716 [2023-11-12 02:03:23,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:03:23,174 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 405 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:03:23,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 1008 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:03:23,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2023-11-12 02:03:23,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 473. [2023-11-12 02:03:23,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 331 states have (on average 1.4229607250755287) internal successors, (471), 331 states have internal predecessors, (471), 135 states have call successors, (135), 6 states have call predecessors, (135), 6 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-12 02:03:23,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 741 transitions. [2023-11-12 02:03:23,256 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 741 transitions. Word has length 306 [2023-11-12 02:03:23,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:03:23,257 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 741 transitions. [2023-11-12 02:03:23,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:03:23,258 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 741 transitions. [2023-11-12 02:03:23,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-12 02:03:23,264 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:23,264 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:23,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:23,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:23,472 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:23,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:23,472 INFO L85 PathProgramCache]: Analyzing trace with hash 841440887, now seen corresponding path program 1 times [2023-11-12 02:03:23,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:23,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644343654] [2023-11-12 02:03:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:23,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:23,579 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:03:23,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91971439] [2023-11-12 02:03:23,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:23,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:23,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:23,581 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:23,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:03:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:23,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:03:23,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1836 proven. 132 refuted. 0 times theorem prover too weak. 1992 trivial. 0 not checked. [2023-11-12 02:03:24,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-12 02:03:25,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:25,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644343654] [2023-11-12 02:03:25,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:03:25,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91971439] [2023-11-12 02:03:25,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91971439] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:03:25,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:03:25,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-12 02:03:25,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692733500] [2023-11-12 02:03:25,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:25,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:03:25,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:25,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:03:25,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:03:25,157 INFO L87 Difference]: Start difference. First operand 473 states and 741 transitions. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 4 states have call successors, (89), 3 states have call predecessors, (89), 5 states have return successors, (90), 3 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-12 02:03:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:03:25,893 INFO L93 Difference]: Finished difference Result 1174 states and 1821 transitions. [2023-11-12 02:03:25,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:03:25,894 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 4 states have call successors, (89), 3 states have call predecessors, (89), 5 states have return successors, (90), 3 states have call predecessors, (90), 4 states have call successors, (90) Word has length 306 [2023-11-12 02:03:25,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:03:25,900 INFO L225 Difference]: With dead ends: 1174 [2023-11-12 02:03:25,901 INFO L226 Difference]: Without dead ends: 812 [2023-11-12 02:03:25,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 602 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:03:25,903 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 1144 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:03:25,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1144 Valid, 768 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:03:25,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2023-11-12 02:03:25,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 500. [2023-11-12 02:03:25,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 352 states have (on average 1.3977272727272727) internal successors, (492), 352 states have internal predecessors, (492), 135 states have call successors, (135), 12 states have call predecessors, (135), 12 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-12 02:03:25,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 762 transitions. [2023-11-12 02:03:25,969 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 762 transitions. Word has length 306 [2023-11-12 02:03:25,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:03:25,970 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 762 transitions. [2023-11-12 02:03:25,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 4 states have call successors, (89), 3 states have call predecessors, (89), 5 states have return successors, (90), 3 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-12 02:03:25,971 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 762 transitions. [2023-11-12 02:03:25,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-12 02:03:25,978 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:25,978 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:25,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:26,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:26,186 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:26,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:26,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2067323015, now seen corresponding path program 1 times [2023-11-12 02:03:26,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:26,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316818185] [2023-11-12 02:03:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:26,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:26,244 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:03:26,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294596288] [2023-11-12 02:03:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:26,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:26,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:26,246 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:26,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:03:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:26,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:03:26,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1518 proven. 99 refuted. 0 times theorem prover too weak. 2343 trivial. 0 not checked. [2023-11-12 02:03:27,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 33 proven. 99 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-12 02:03:27,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:27,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316818185] [2023-11-12 02:03:27,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:03:27,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294596288] [2023-11-12 02:03:27,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294596288] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:03:27,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:03:27,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 02:03:27,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133961959] [2023-11-12 02:03:27,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:27,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:03:27,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:27,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:03:27,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:03:27,345 INFO L87 Difference]: Start difference. First operand 500 states and 762 transitions. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 3 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 3 states have call predecessors, (79), 3 states have call successors, (79) [2023-11-12 02:03:27,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:03:27,756 INFO L93 Difference]: Finished difference Result 915 states and 1386 transitions. [2023-11-12 02:03:27,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:03:27,757 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 3 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 3 states have call predecessors, (79), 3 states have call successors, (79) Word has length 306 [2023-11-12 02:03:27,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:03:27,763 INFO L225 Difference]: With dead ends: 915 [2023-11-12 02:03:27,763 INFO L226 Difference]: Without dead ends: 524 [2023-11-12 02:03:27,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:03:27,766 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 262 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:03:27,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 492 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:03:27,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-11-12 02:03:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 512. [2023-11-12 02:03:27,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 361 states have (on average 1.3795013850415512) internal successors, (498), 361 states have internal predecessors, (498), 135 states have call successors, (135), 15 states have call predecessors, (135), 15 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-12 02:03:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 768 transitions. [2023-11-12 02:03:27,836 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 768 transitions. Word has length 306 [2023-11-12 02:03:27,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:03:27,838 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 768 transitions. [2023-11-12 02:03:27,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 3 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 3 states have call predecessors, (79), 3 states have call successors, (79) [2023-11-12 02:03:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 768 transitions. [2023-11-12 02:03:27,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-12 02:03:27,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:27,841 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:27,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:28,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:28,054 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:28,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:28,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1407791493, now seen corresponding path program 1 times [2023-11-12 02:03:28,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:28,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291420651] [2023-11-12 02:03:28,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:28,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:28,113 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:03:28,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396846018] [2023-11-12 02:03:28,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:28,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:28,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:28,119 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:28,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:03:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:28,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:03:28,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1934 proven. 51 refuted. 0 times theorem prover too weak. 1975 trivial. 0 not checked. [2023-11-12 02:03:28,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 81 proven. 51 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-12 02:03:29,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:29,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291420651] [2023-11-12 02:03:29,050 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:03:29,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396846018] [2023-11-12 02:03:29,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396846018] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:03:29,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:03:29,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-12 02:03:29,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626948112] [2023-11-12 02:03:29,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:29,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:03:29,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:29,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:03:29,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:03:29,055 INFO L87 Difference]: Start difference. First operand 512 states and 768 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 2 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-12 02:03:29,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:03:29,949 INFO L93 Difference]: Finished difference Result 1349 states and 2005 transitions. [2023-11-12 02:03:29,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:03:29,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 2 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) Word has length 306 [2023-11-12 02:03:29,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:03:29,961 INFO L225 Difference]: With dead ends: 1349 [2023-11-12 02:03:29,961 INFO L226 Difference]: Without dead ends: 954 [2023-11-12 02:03:29,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 603 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:03:29,965 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 590 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:03:29,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 778 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:03:29,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2023-11-12 02:03:30,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 682. [2023-11-12 02:03:30,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 528 states have (on average 1.4109848484848484) internal successors, (745), 528 states have internal predecessors, (745), 135 states have call successors, (135), 18 states have call predecessors, (135), 18 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-12 02:03:30,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1015 transitions. [2023-11-12 02:03:30,052 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1015 transitions. Word has length 306 [2023-11-12 02:03:30,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:03:30,053 INFO L495 AbstractCegarLoop]: Abstraction has 682 states and 1015 transitions. [2023-11-12 02:03:30,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 2 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-12 02:03:30,054 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1015 transitions. [2023-11-12 02:03:30,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-12 02:03:30,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:30,057 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:30,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-12 02:03:30,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:30,265 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:30,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:30,266 INFO L85 PathProgramCache]: Analyzing trace with hash -984144771, now seen corresponding path program 1 times [2023-11-12 02:03:30,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:30,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275245710] [2023-11-12 02:03:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:30,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:30,325 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:03:30,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628711108] [2023-11-12 02:03:30,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:30,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:30,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:30,327 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:30,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:03:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:30,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:03:30,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1994 proven. 57 refuted. 0 times theorem prover too weak. 1909 trivial. 0 not checked. [2023-11-12 02:03:30,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 75 proven. 57 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-12 02:03:31,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:31,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275245710] [2023-11-12 02:03:31,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:03:31,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628711108] [2023-11-12 02:03:31,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628711108] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:03:31,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:03:31,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-12 02:03:31,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762912880] [2023-11-12 02:03:31,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:31,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:03:31,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:31,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:03:31,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:03:31,266 INFO L87 Difference]: Start difference. First operand 682 states and 1015 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2023-11-12 02:03:31,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:03:31,790 INFO L93 Difference]: Finished difference Result 1154 states and 1688 transitions. [2023-11-12 02:03:31,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:03:31,791 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) Word has length 306 [2023-11-12 02:03:31,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:03:31,796 INFO L225 Difference]: With dead ends: 1154 [2023-11-12 02:03:31,796 INFO L226 Difference]: Without dead ends: 605 [2023-11-12 02:03:31,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 603 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:03:31,800 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 284 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:03:31,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 505 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:03:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2023-11-12 02:03:31,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 536. [2023-11-12 02:03:31,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 379 states have (on average 1.3139841688654355) internal successors, (498), 379 states have internal predecessors, (498), 135 states have call successors, (135), 21 states have call predecessors, (135), 21 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-12 02:03:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 768 transitions. [2023-11-12 02:03:31,875 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 768 transitions. Word has length 306 [2023-11-12 02:03:31,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:03:31,876 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 768 transitions. [2023-11-12 02:03:31,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2023-11-12 02:03:31,877 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 768 transitions. [2023-11-12 02:03:31,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-12 02:03:31,879 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:31,880 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:31,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:32,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:32,087 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:32,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:32,088 INFO L85 PathProgramCache]: Analyzing trace with hash 88473021, now seen corresponding path program 1 times [2023-11-12 02:03:32,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:32,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94530484] [2023-11-12 02:03:32,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:32,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:32,186 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:03:32,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095476380] [2023-11-12 02:03:32,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:32,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:32,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:32,188 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:32,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:03:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:32,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 02:03:32,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 722 proven. 246 refuted. 0 times theorem prover too weak. 2992 trivial. 0 not checked. [2023-11-12 02:03:33,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 12 proven. 249 refuted. 0 times theorem prover too weak. 3699 trivial. 0 not checked. [2023-11-12 02:03:34,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:34,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94530484] [2023-11-12 02:03:34,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:03:34,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095476380] [2023-11-12 02:03:34,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095476380] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:03:34,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:03:34,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-12 02:03:34,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520073279] [2023-11-12 02:03:34,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:34,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:03:34,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:34,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:03:34,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:03:34,363 INFO L87 Difference]: Start difference. First operand 536 states and 768 transitions. Second operand has 18 states, 18 states have (on average 8.5) internal successors, (153), 18 states have internal predecessors, (153), 5 states have call successors, (89), 3 states have call predecessors, (89), 7 states have return successors, (90), 4 states have call predecessors, (90), 5 states have call successors, (90) [2023-11-12 02:03:35,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:03:35,541 INFO L93 Difference]: Finished difference Result 980 states and 1388 transitions. [2023-11-12 02:03:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:03:35,542 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.5) internal successors, (153), 18 states have internal predecessors, (153), 5 states have call successors, (89), 3 states have call predecessors, (89), 7 states have return successors, (90), 4 states have call predecessors, (90), 5 states have call successors, (90) Word has length 307 [2023-11-12 02:03:35,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:03:35,547 INFO L225 Difference]: With dead ends: 980 [2023-11-12 02:03:35,547 INFO L226 Difference]: Without dead ends: 578 [2023-11-12 02:03:35,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2023-11-12 02:03:35,550 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 519 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:03:35,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 851 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:03:35,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2023-11-12 02:03:35,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 548. [2023-11-12 02:03:35,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 388 states have (on average 1.2989690721649485) internal successors, (504), 388 states have internal predecessors, (504), 135 states have call successors, (135), 24 states have call predecessors, (135), 24 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-12 02:03:35,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 774 transitions. [2023-11-12 02:03:35,626 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 774 transitions. Word has length 307 [2023-11-12 02:03:35,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:03:35,627 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 774 transitions. [2023-11-12 02:03:35,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.5) internal successors, (153), 18 states have internal predecessors, (153), 5 states have call successors, (89), 3 states have call predecessors, (89), 7 states have return successors, (90), 4 states have call predecessors, (90), 5 states have call successors, (90) [2023-11-12 02:03:35,627 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 774 transitions. [2023-11-12 02:03:35,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-12 02:03:35,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:35,630 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:35,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:35,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:03:35,842 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:35,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:35,843 INFO L85 PathProgramCache]: Analyzing trace with hash -421000069, now seen corresponding path program 1 times [2023-11-12 02:03:35,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:35,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318533344] [2023-11-12 02:03:35,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:35,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:35,898 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:03:35,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251022236] [2023-11-12 02:03:35,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:35,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:35,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:35,900 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:35,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:03:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:36,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:03:36,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-12 02:03:36,759 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:03:36,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:36,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318533344] [2023-11-12 02:03:36,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:03:36,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251022236] [2023-11-12 02:03:36,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251022236] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:03:36,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:03:36,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:03:36,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496347292] [2023-11-12 02:03:36,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:03:36,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:03:36,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:36,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:03:36,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:03:36,762 INFO L87 Difference]: Start difference. First operand 548 states and 774 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:03:37,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:03:37,047 INFO L93 Difference]: Finished difference Result 1117 states and 1595 transitions. [2023-11-12 02:03:37,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:03:37,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 307 [2023-11-12 02:03:37,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:03:37,054 INFO L225 Difference]: With dead ends: 1117 [2023-11-12 02:03:37,054 INFO L226 Difference]: Without dead ends: 689 [2023-11-12 02:03:37,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:03:37,057 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 158 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:03:37,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 703 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:03:37,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2023-11-12 02:03:37,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 548. [2023-11-12 02:03:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 388 states have (on average 1.2963917525773196) internal successors, (503), 388 states have internal predecessors, (503), 135 states have call successors, (135), 24 states have call predecessors, (135), 24 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-12 02:03:37,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 773 transitions. [2023-11-12 02:03:37,142 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 773 transitions. Word has length 307 [2023-11-12 02:03:37,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:03:37,143 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 773 transitions. [2023-11-12 02:03:37,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:03:37,143 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 773 transitions. [2023-11-12 02:03:37,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-12 02:03:37,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:37,146 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:37,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:37,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:03:37,355 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:37,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:37,355 INFO L85 PathProgramCache]: Analyzing trace with hash -172853575, now seen corresponding path program 1 times [2023-11-12 02:03:37,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:37,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026487020] [2023-11-12 02:03:37,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:37,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:37,417 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:03:37,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279462601] [2023-11-12 02:03:37,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:37,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:37,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:37,419 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:37,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:03:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:37,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 02:03:37,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-12 02:03:38,281 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:03:38,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:38,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026487020] [2023-11-12 02:03:38,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:03:38,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279462601] [2023-11-12 02:03:38,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279462601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:03:38,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:03:38,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:03:38,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496400302] [2023-11-12 02:03:38,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:03:38,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:03:38,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:38,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:03:38,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:03:38,285 INFO L87 Difference]: Start difference. First operand 548 states and 773 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:03:39,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:03:39,626 INFO L93 Difference]: Finished difference Result 3200 states and 4519 transitions. [2023-11-12 02:03:39,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 02:03:39,627 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 307 [2023-11-12 02:03:39,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:03:39,645 INFO L225 Difference]: With dead ends: 3200 [2023-11-12 02:03:39,645 INFO L226 Difference]: Without dead ends: 2795 [2023-11-12 02:03:39,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:03:39,648 INFO L413 NwaCegarLoop]: 779 mSDtfsCounter, 1295 mSDsluCounter, 2953 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1295 SdHoareTripleChecker+Valid, 3732 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:03:39,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1295 Valid, 3732 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:03:39,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2023-11-12 02:03:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 1614. [2023-11-12 02:03:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1179 states have (on average 1.3044953350296862) internal successors, (1538), 1183 states have internal predecessors, (1538), 363 states have call successors, (363), 71 states have call predecessors, (363), 71 states have return successors, (363), 359 states have call predecessors, (363), 363 states have call successors, (363) [2023-11-12 02:03:39,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2264 transitions. [2023-11-12 02:03:39,898 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2264 transitions. Word has length 307 [2023-11-12 02:03:39,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:03:39,899 INFO L495 AbstractCegarLoop]: Abstraction has 1614 states and 2264 transitions. [2023-11-12 02:03:39,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:03:39,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2264 transitions. [2023-11-12 02:03:39,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-12 02:03:39,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:39,903 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:39,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:40,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:03:40,116 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:40,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:40,117 INFO L85 PathProgramCache]: Analyzing trace with hash -245240133, now seen corresponding path program 1 times [2023-11-12 02:03:40,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:40,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762165027] [2023-11-12 02:03:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:40,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:40,176 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:03:40,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120517171] [2023-11-12 02:03:40,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:40,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:40,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:40,178 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:40,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:03:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:40,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:03:40,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-12 02:03:41,824 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:03:41,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:41,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762165027] [2023-11-12 02:03:41,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:03:41,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120517171] [2023-11-12 02:03:41,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120517171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:03:41,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:03:41,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:03:41,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868264365] [2023-11-12 02:03:41,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:03:41,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:03:41,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:41,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:03:41,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:03:41,829 INFO L87 Difference]: Start difference. First operand 1614 states and 2264 transitions. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:03:43,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:03:43,940 INFO L93 Difference]: Finished difference Result 4919 states and 6884 transitions. [2023-11-12 02:03:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:03:43,941 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 307 [2023-11-12 02:03:43,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:03:43,965 INFO L225 Difference]: With dead ends: 4919 [2023-11-12 02:03:43,965 INFO L226 Difference]: Without dead ends: 3462 [2023-11-12 02:03:43,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:03:43,972 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 903 mSDsluCounter, 2273 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 2893 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:03:43,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [903 Valid, 2893 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-12 02:03:43,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3462 states. [2023-11-12 02:03:44,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3462 to 1609. [2023-11-12 02:03:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1174 states have (on average 1.303236797274276) internal successors, (1530), 1178 states have internal predecessors, (1530), 363 states have call successors, (363), 71 states have call predecessors, (363), 71 states have return successors, (363), 359 states have call predecessors, (363), 363 states have call successors, (363) [2023-11-12 02:03:44,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2256 transitions. [2023-11-12 02:03:44,305 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2256 transitions. Word has length 307 [2023-11-12 02:03:44,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:03:44,306 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 2256 transitions. [2023-11-12 02:03:44,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:03:44,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2256 transitions. [2023-11-12 02:03:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2023-11-12 02:03:44,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:44,310 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:44,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:44,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:03:44,519 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:44,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:44,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1478668735, now seen corresponding path program 1 times [2023-11-12 02:03:44,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:44,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775600775] [2023-11-12 02:03:44,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:44,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:44,576 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:03:44,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246062813] [2023-11-12 02:03:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:44,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:44,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:44,583 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:44,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:03:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:45,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:03:45,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1934 proven. 51 refuted. 0 times theorem prover too weak. 1975 trivial. 0 not checked. [2023-11-12 02:03:45,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 81 proven. 51 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-12 02:03:46,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:46,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775600775] [2023-11-12 02:03:46,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:03:46,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246062813] [2023-11-12 02:03:46,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246062813] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:03:46,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:03:46,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2023-11-12 02:03:46,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044275186] [2023-11-12 02:03:46,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:46,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:03:46,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:46,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:03:46,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:03:46,145 INFO L87 Difference]: Start difference. First operand 1609 states and 2256 transitions. Second operand has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 13 states have internal predecessors, (140), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-12 02:03:47,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:03:47,682 INFO L93 Difference]: Finished difference Result 4611 states and 6455 transitions. [2023-11-12 02:03:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:03:47,683 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 13 states have internal predecessors, (140), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) Word has length 308 [2023-11-12 02:03:47,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:03:47,704 INFO L225 Difference]: With dead ends: 4611 [2023-11-12 02:03:47,704 INFO L226 Difference]: Without dead ends: 3125 [2023-11-12 02:03:47,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 603 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:03:47,710 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 864 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:03:47,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 1364 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:03:47,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2023-11-12 02:03:47,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 1147. [2023-11-12 02:03:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 876 states have (on average 1.3139269406392695) internal successors, (1151), 876 states have internal predecessors, (1151), 225 states have call successors, (225), 45 states have call predecessors, (225), 45 states have return successors, (225), 225 states have call predecessors, (225), 225 states have call successors, (225) [2023-11-12 02:03:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1601 transitions. [2023-11-12 02:03:47,958 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1601 transitions. Word has length 308 [2023-11-12 02:03:47,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:03:47,959 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1601 transitions. [2023-11-12 02:03:47,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 13 states have internal predecessors, (140), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-12 02:03:47,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1601 transitions. [2023-11-12 02:03:47,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-12 02:03:47,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:47,963 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:47,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:48,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:03:48,171 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:48,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:48,171 INFO L85 PathProgramCache]: Analyzing trace with hash -431185301, now seen corresponding path program 1 times [2023-11-12 02:03:48,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:48,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114767142] [2023-11-12 02:03:48,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:48,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:48,235 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:03:48,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154989315] [2023-11-12 02:03:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:48,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:48,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:48,237 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:48,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:03:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:48,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:03:48,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 384 proven. 126 refuted. 0 times theorem prover too weak. 3450 trivial. 0 not checked. [2023-11-12 02:03:49,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 6 proven. 126 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-12 02:03:50,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:50,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114767142] [2023-11-12 02:03:50,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:03:50,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154989315] [2023-11-12 02:03:50,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154989315] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:03:50,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:03:50,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-12 02:03:50,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348485748] [2023-11-12 02:03:50,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:50,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:03:50,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:50,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:03:50,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:03:50,198 INFO L87 Difference]: Start difference. First operand 1147 states and 1601 transitions. Second operand has 10 states, 10 states have (on average 15.1) internal successors, (151), 10 states have internal predecessors, (151), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-12 02:03:50,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:03:50,754 INFO L93 Difference]: Finished difference Result 2227 states and 3091 transitions. [2023-11-12 02:03:50,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:03:50,755 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.1) internal successors, (151), 10 states have internal predecessors, (151), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) Word has length 309 [2023-11-12 02:03:50,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:03:50,763 INFO L225 Difference]: With dead ends: 2227 [2023-11-12 02:03:50,763 INFO L226 Difference]: Without dead ends: 1201 [2023-11-12 02:03:50,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:03:50,768 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 108 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:03:50,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 427 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:03:50,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2023-11-12 02:03:50,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1151. [2023-11-12 02:03:50,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 875 states have (on average 1.2857142857142858) internal successors, (1125), 875 states have internal predecessors, (1125), 225 states have call successors, (225), 50 states have call predecessors, (225), 50 states have return successors, (225), 225 states have call predecessors, (225), 225 states have call successors, (225) [2023-11-12 02:03:50,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1575 transitions. [2023-11-12 02:03:50,989 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1575 transitions. Word has length 309 [2023-11-12 02:03:50,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:03:50,990 INFO L495 AbstractCegarLoop]: Abstraction has 1151 states and 1575 transitions. [2023-11-12 02:03:50,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.1) internal successors, (151), 10 states have internal predecessors, (151), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-12 02:03:50,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1575 transitions. [2023-11-12 02:03:50,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-12 02:03:50,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:50,993 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:51,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:51,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:03:51,201 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:51,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:51,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1519495057, now seen corresponding path program 1 times [2023-11-12 02:03:51,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:51,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731041230] [2023-11-12 02:03:51,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:51,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:51,254 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:03:51,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988069167] [2023-11-12 02:03:51,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:51,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:51,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:51,256 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:51,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa1f3c8-f5b6-4d2e-a722-97d82cf31c63/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-12 02:03:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:51,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:03:51,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1518 proven. 99 refuted. 0 times theorem prover too weak. 2343 trivial. 0 not checked. [2023-11-12 02:03:52,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 33 proven. 99 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-12 02:03:53,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:53,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731041230] [2023-11-12 02:03:53,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:03:53,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988069167] [2023-11-12 02:03:53,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988069167] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:03:53,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:03:53,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-12 02:03:53,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296565725] [2023-11-12 02:03:53,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:53,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:03:53,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:53,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:03:53,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:03:53,076 INFO L87 Difference]: Start difference. First operand 1151 states and 1575 transitions. Second operand has 12 states, 12 states have (on average 12.166666666666666) internal successors, (146), 12 states have internal predecessors, (146), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-12 02:03:57,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []