./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-59.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-59.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 289b45da4bea8bfdbcf41d26380b7f379a51fb397d148d9c258f00110e619e0c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:45:38,332 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:45:38,455 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:45:38,465 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:45:38,466 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:45:38,507 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:45:38,507 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:45:38,508 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:45:38,509 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:45:38,515 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:45:38,515 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:45:38,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:45:38,517 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:45:38,519 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:45:38,519 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:45:38,520 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:45:38,520 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:45:38,521 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:45:38,522 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:45:38,522 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:45:38,523 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:45:38,523 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:45:38,524 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:45:38,524 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:45:38,525 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:45:38,525 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:45:38,526 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:45:38,527 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:45:38,527 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:45:38,527 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:45:38,529 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:45:38,529 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:45:38,529 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:45:38,530 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:45:38,530 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:45:38,530 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:45:38,531 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:45:38,531 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:45:38,531 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:45:38,531 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:45:38,532 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:45:38,532 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:45:38,532 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_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 289b45da4bea8bfdbcf41d26380b7f379a51fb397d148d9c258f00110e619e0c [2023-11-26 10:45:38,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:45:38,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:45:38,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:45:38,888 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:45:38,888 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:45:38,891 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-59.i [2023-11-26 10:45:42,104 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:45:42,460 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:45:42,463 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-59.i [2023-11-26 10:45:42,485 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/data/826a779a5/8c1b84bc14494a4dae0ba34ca2a75017/FLAGf04b6cae5 [2023-11-26 10:45:42,503 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/data/826a779a5/8c1b84bc14494a4dae0ba34ca2a75017 [2023-11-26 10:45:42,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:45:42,509 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:45:42,510 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:45:42,511 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:45:42,517 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:45:42,518 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:45:42" (1/1) ... [2023-11-26 10:45:42,520 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@189dfe21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:42, skipping insertion in model container [2023-11-26 10:45:42,520 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:45:42" (1/1) ... [2023-11-26 10:45:42,592 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:45:42,834 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_e4460357-c0b5-49db-b1c1-820e43b43800/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-59.i[916,929] [2023-11-26 10:45:43,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:45:43,057 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:45:43,073 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_e4460357-c0b5-49db-b1c1-820e43b43800/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-59.i[916,929] [2023-11-26 10:45:43,156 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:45:43,178 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:45:43,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:43 WrapperNode [2023-11-26 10:45:43,179 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:45:43,180 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:45:43,181 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:45:43,181 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:45:43,190 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:43" (1/1) ... [2023-11-26 10:45:43,212 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:43" (1/1) ... [2023-11-26 10:45:43,405 INFO L138 Inliner]: procedures = 26, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 430 [2023-11-26 10:45:43,406 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:45:43,406 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:45:43,407 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:45:43,407 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:45:43,423 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:43" (1/1) ... [2023-11-26 10:45:43,424 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:43" (1/1) ... [2023-11-26 10:45:43,449 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:43" (1/1) ... [2023-11-26 10:45:43,512 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 10:45:43,512 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:43" (1/1) ... [2023-11-26 10:45:43,512 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:43" (1/1) ... [2023-11-26 10:45:43,553 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:43" (1/1) ... [2023-11-26 10:45:43,576 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:43" (1/1) ... [2023-11-26 10:45:43,582 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:43" (1/1) ... [2023-11-26 10:45:43,597 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:43" (1/1) ... [2023-11-26 10:45:43,612 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:45:43,613 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:45:43,613 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:45:43,614 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:45:43,614 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:43" (1/1) ... [2023-11-26 10:45:43,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:45:43,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:43,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:45:43,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:45:43,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:45:43,705 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:45:43,706 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:45:43,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:45:43,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:45:43,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:45:43,896 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:45:43,899 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:45:45,025 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:45:45,086 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:45:45,087 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:45:45,088 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:45:45 BoogieIcfgContainer [2023-11-26 10:45:45,088 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:45:45,091 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:45:45,091 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:45:45,096 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:45:45,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:45:42" (1/3) ... [2023-11-26 10:45:45,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d1f0680 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:45:45, skipping insertion in model container [2023-11-26 10:45:45,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:43" (2/3) ... [2023-11-26 10:45:45,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d1f0680 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:45:45, skipping insertion in model container [2023-11-26 10:45:45,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:45:45" (3/3) ... [2023-11-26 10:45:45,102 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-59.i [2023-11-26 10:45:45,125 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:45:45,125 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:45:45,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:45:45,214 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;@7496da8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:45:45,214 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:45:45,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 115 states have (on average 1.5826086956521739) internal successors, (182), 116 states have internal predecessors, (182), 47 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-26 10:45:45,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2023-11-26 10:45:45,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:45,246 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:45,247 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:45,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:45,253 INFO L85 PathProgramCache]: Analyzing trace with hash 502041229, now seen corresponding path program 1 times [2023-11-26 10:45:45,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:45,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695679325] [2023-11-26 10:45:45,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:45,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:45,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:45,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695679325] [2023-11-26 10:45:45,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:45:45,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239227562] [2023-11-26 10:45:45,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:45,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:45,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:45,636 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:45,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:45:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:45,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 10:45:45,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2023-11-26 10:45:46,024 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:46,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239227562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:46,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:46,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:45:46,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695486027] [2023-11-26 10:45:46,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:46,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:45:46,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:46,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:45:46,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:45:46,080 INFO L87 Difference]: Start difference. First operand has 165 states, 115 states have (on average 1.5826086956521739) internal successors, (182), 116 states have internal predecessors, (182), 47 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) Second operand has 2 states, 2 states have (on average 37.5) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 2 states have call successors, (47) [2023-11-26 10:45:46,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:46,159 INFO L93 Difference]: Finished difference Result 327 states and 597 transitions. [2023-11-26 10:45:46,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:45:46,162 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 37.5) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 2 states have call successors, (47) Word has length 305 [2023-11-26 10:45:46,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:46,176 INFO L225 Difference]: With dead ends: 327 [2023-11-26 10:45:46,176 INFO L226 Difference]: Without dead ends: 163 [2023-11-26 10:45:46,182 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 [2023-11-26 10:45:46,186 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:46,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 267 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:46,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-26 10:45:46,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2023-11-26 10:45:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 114 states have (on average 1.543859649122807) internal successors, (176), 114 states have internal predecessors, (176), 47 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-26 10:45:46,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 270 transitions. [2023-11-26 10:45:46,282 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 270 transitions. Word has length 305 [2023-11-26 10:45:46,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:46,283 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 270 transitions. [2023-11-26 10:45:46,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.5) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 2 states have call successors, (47) [2023-11-26 10:45:46,284 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 270 transitions. [2023-11-26 10:45:46,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-26 10:45:46,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:46,292 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:46,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:46,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 10:45:46,500 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:46,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:46,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1089539705, now seen corresponding path program 1 times [2023-11-26 10:45:46,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:46,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653995402] [2023-11-26 10:45:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:46,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:46,652 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:46,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274842424] [2023-11-26 10:45:46,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:46,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:46,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:46,655 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:46,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:45:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:46,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:45:46,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 46 proven. 138 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2023-11-26 10:45:47,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-11-26 10:45:48,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:48,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653995402] [2023-11-26 10:45:48,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:48,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274842424] [2023-11-26 10:45:48,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274842424] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:48,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:45:48,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-26 10:45:48,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331996781] [2023-11-26 10:45:48,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:48,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:45:48,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:48,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:45:48,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:45:48,129 INFO L87 Difference]: Start difference. First operand 163 states and 270 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) [2023-11-26 10:45:48,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:48,449 INFO L93 Difference]: Finished difference Result 412 states and 686 transitions. [2023-11-26 10:45:48,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:45:48,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) Word has length 306 [2023-11-26 10:45:48,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:48,460 INFO L225 Difference]: With dead ends: 412 [2023-11-26 10:45:48,460 INFO L226 Difference]: Without dead ends: 250 [2023-11-26 10:45:48,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:45:48,464 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 232 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:48,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 710 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:45:48,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-11-26 10:45:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 207. [2023-11-26 10:45:48,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 158 states have (on average 1.5949367088607596) internal successors, (252), 158 states have internal predecessors, (252), 47 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-26 10:45:48,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 346 transitions. [2023-11-26 10:45:48,498 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 346 transitions. Word has length 306 [2023-11-26 10:45:48,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:48,501 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 346 transitions. [2023-11-26 10:45:48,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) [2023-11-26 10:45:48,502 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 346 transitions. [2023-11-26 10:45:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-26 10:45:48,510 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:48,510 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:48,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:48,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:48,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:48,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:48,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1177584183, now seen corresponding path program 1 times [2023-11-26 10:45:48,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:48,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379929221] [2023-11-26 10:45:48,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:48,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:48,821 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:48,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783548538] [2023-11-26 10:45:48,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:48,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:48,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:48,829 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:48,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:45:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:49,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:45:49,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 46 proven. 138 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2023-11-26 10:45:49,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2023-11-26 10:45:50,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:50,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379929221] [2023-11-26 10:45:50,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:50,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783548538] [2023-11-26 10:45:50,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783548538] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:50,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:45:50,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-26 10:45:50,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586045834] [2023-11-26 10:45:50,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:50,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:45:50,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:50,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:45:50,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:45:50,538 INFO L87 Difference]: Start difference. First operand 207 states and 346 transitions. Second operand has 14 states, 14 states have (on average 9.357142857142858) internal successors, (131), 14 states have internal predecessors, (131), 3 states have call successors, (93), 2 states have call predecessors, (93), 4 states have return successors, (94), 2 states have call predecessors, (94), 3 states have call successors, (94) [2023-11-26 10:45:52,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:52,546 INFO L93 Difference]: Finished difference Result 1019 states and 1702 transitions. [2023-11-26 10:45:52,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-26 10:45:52,547 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.357142857142858) internal successors, (131), 14 states have internal predecessors, (131), 3 states have call successors, (93), 2 states have call predecessors, (93), 4 states have return successors, (94), 2 states have call predecessors, (94), 3 states have call successors, (94) Word has length 307 [2023-11-26 10:45:52,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:52,557 INFO L225 Difference]: With dead ends: 1019 [2023-11-26 10:45:52,557 INFO L226 Difference]: Without dead ends: 813 [2023-11-26 10:45:52,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 602 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2023-11-26 10:45:52,561 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 1183 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:52,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1185 Valid, 1708 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1343 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-26 10:45:52,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2023-11-26 10:45:52,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 609. [2023-11-26 10:45:52,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 461 states have (on average 1.5466377440347072) internal successors, (713), 461 states have internal predecessors, (713), 141 states have call successors, (141), 6 states have call predecessors, (141), 6 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2023-11-26 10:45:52,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 995 transitions. [2023-11-26 10:45:52,739 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 995 transitions. Word has length 307 [2023-11-26 10:45:52,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:52,741 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 995 transitions. [2023-11-26 10:45:52,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.357142857142858) internal successors, (131), 14 states have internal predecessors, (131), 3 states have call successors, (93), 2 states have call predecessors, (93), 4 states have return successors, (94), 2 states have call predecessors, (94), 3 states have call successors, (94) [2023-11-26 10:45:52,742 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 995 transitions. [2023-11-26 10:45:52,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-26 10:45:52,749 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:52,749 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:52,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:52,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:52,959 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:52,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:52,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1194155079, now seen corresponding path program 1 times [2023-11-26 10:45:52,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:52,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470522922] [2023-11-26 10:45:52,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:52,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:53,047 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:53,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160101330] [2023-11-26 10:45:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:53,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:53,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:53,059 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:53,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:45:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:53,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:45:53,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-11-26 10:45:53,500 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:53,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:53,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470522922] [2023-11-26 10:45:53,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:53,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160101330] [2023-11-26 10:45:53,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160101330] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:53,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:53,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:45:53,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848942672] [2023-11-26 10:45:53,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:53,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:45:53,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:53,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:45:53,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:53,508 INFO L87 Difference]: Start difference. First operand 609 states and 995 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) [2023-11-26 10:45:53,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:53,636 INFO L93 Difference]: Finished difference Result 1825 states and 2983 transitions. [2023-11-26 10:45:53,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:45:53,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) Word has length 307 [2023-11-26 10:45:53,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:53,648 INFO L225 Difference]: With dead ends: 1825 [2023-11-26 10:45:53,648 INFO L226 Difference]: Without dead ends: 1217 [2023-11-26 10:45:53,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:53,652 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 250 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:53,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 718 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:53,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2023-11-26 10:45:53,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 897. [2023-11-26 10:45:53,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 749 states have (on average 1.588785046728972) internal successors, (1190), 749 states have internal predecessors, (1190), 141 states have call successors, (141), 6 states have call predecessors, (141), 6 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2023-11-26 10:45:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1472 transitions. [2023-11-26 10:45:53,832 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1472 transitions. Word has length 307 [2023-11-26 10:45:53,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:53,836 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1472 transitions. [2023-11-26 10:45:53,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) [2023-11-26 10:45:53,837 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1472 transitions. [2023-11-26 10:45:53,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-26 10:45:53,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:53,847 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:53,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 10:45:54,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:54,058 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:54,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:54,059 INFO L85 PathProgramCache]: Analyzing trace with hash -492555205, now seen corresponding path program 1 times [2023-11-26 10:45:54,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:54,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211466869] [2023-11-26 10:45:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:54,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:54,136 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:54,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468434552] [2023-11-26 10:45:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:54,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:54,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:54,139 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:54,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:45:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:54,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:45:54,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-11-26 10:45:54,430 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:54,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:54,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211466869] [2023-11-26 10:45:54,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:54,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468434552] [2023-11-26 10:45:54,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468434552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:54,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:54,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:45:54,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188278715] [2023-11-26 10:45:54,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:54,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:45:54,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:54,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:45:54,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:54,441 INFO L87 Difference]: Start difference. First operand 897 states and 1472 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) [2023-11-26 10:45:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:54,601 INFO L93 Difference]: Finished difference Result 1308 states and 2122 transitions. [2023-11-26 10:45:54,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:45:54,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) Word has length 307 [2023-11-26 10:45:54,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:54,606 INFO L225 Difference]: With dead ends: 1308 [2023-11-26 10:45:54,606 INFO L226 Difference]: Without dead ends: 412 [2023-11-26 10:45:54,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:54,610 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 233 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:54,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 477 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:54,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-11-26 10:45:54,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 300. [2023-11-26 10:45:54,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 250 states have (on average 1.468) internal successors, (367), 250 states have internal predecessors, (367), 47 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-26 10:45:54,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 461 transitions. [2023-11-26 10:45:54,648 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 461 transitions. Word has length 307 [2023-11-26 10:45:54,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:54,649 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 461 transitions. [2023-11-26 10:45:54,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) [2023-11-26 10:45:54,651 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 461 transitions. [2023-11-26 10:45:54,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2023-11-26 10:45:54,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:54,656 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:54,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 10:45:54,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:54,864 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:54,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:54,865 INFO L85 PathProgramCache]: Analyzing trace with hash 291481249, now seen corresponding path program 1 times [2023-11-26 10:45:54,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:54,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913229568] [2023-11-26 10:45:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:54,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:54,924 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:54,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248362135] [2023-11-26 10:45:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:54,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:54,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:54,926 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:54,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:45:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:55,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:45:55,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2794 proven. 27 refuted. 0 times theorem prover too weak. 1503 trivial. 0 not checked. [2023-11-26 10:45:55,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 111 proven. 27 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2023-11-26 10:45:56,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:56,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913229568] [2023-11-26 10:45:56,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:56,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248362135] [2023-11-26 10:45:56,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248362135] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:56,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:45:56,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-26 10:45:56,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016503433] [2023-11-26 10:45:56,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:56,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:45:56,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:56,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:45:56,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:45:56,048 INFO L87 Difference]: Start difference. First operand 300 states and 461 transitions. Second operand has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 5 states have call successors, (72), 3 states have call predecessors, (72), 5 states have return successors, (72), 5 states have call predecessors, (72), 5 states have call successors, (72) [2023-11-26 10:45:56,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:56,519 INFO L93 Difference]: Finished difference Result 605 states and 926 transitions. [2023-11-26 10:45:56,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:45:56,519 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 5 states have call successors, (72), 3 states have call predecessors, (72), 5 states have return successors, (72), 5 states have call predecessors, (72), 5 states have call successors, (72) Word has length 308 [2023-11-26 10:45:56,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:56,522 INFO L225 Difference]: With dead ends: 605 [2023-11-26 10:45:56,523 INFO L226 Difference]: Without dead ends: 306 [2023-11-26 10:45:56,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:45:56,525 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 171 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:56,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 462 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:45:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-11-26 10:45:56,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2023-11-26 10:45:56,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 253 states have (on average 1.4426877470355732) internal successors, (365), 253 states have internal predecessors, (365), 47 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-26 10:45:56,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 459 transitions. [2023-11-26 10:45:56,557 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 459 transitions. Word has length 308 [2023-11-26 10:45:56,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:56,558 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 459 transitions. [2023-11-26 10:45:56,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 5 states have call successors, (72), 3 states have call predecessors, (72), 5 states have return successors, (72), 5 states have call predecessors, (72), 5 states have call successors, (72) [2023-11-26 10:45:56,559 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 459 transitions. [2023-11-26 10:45:56,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-26 10:45:56,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:56,562 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:56,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:56,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 10:45:56,769 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:56,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:56,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1573148350, now seen corresponding path program 1 times [2023-11-26 10:45:56,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:56,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459122890] [2023-11-26 10:45:56,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:56,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:56,836 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:56,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192717087] [2023-11-26 10:45:56,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:56,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:56,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:56,838 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:56,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:45:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:57,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-26 10:45:57,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2814 proven. 399 refuted. 0 times theorem prover too weak. 1111 trivial. 0 not checked. [2023-11-26 10:45:59,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 177 proven. 96 refuted. 0 times theorem prover too weak. 4051 trivial. 0 not checked. [2023-11-26 10:46:01,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:01,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459122890] [2023-11-26 10:46:01,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:46:01,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192717087] [2023-11-26 10:46:01,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192717087] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:01,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:46:01,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2023-11-26 10:46:01,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91696330] [2023-11-26 10:46:01,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:01,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 10:46:01,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:01,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 10:46:01,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2023-11-26 10:46:01,980 INFO L87 Difference]: Start difference. First operand 304 states and 459 transitions. Second operand has 22 states, 22 states have (on average 7.2272727272727275) internal successors, (159), 21 states have internal predecessors, (159), 7 states have call successors, (90), 5 states have call predecessors, (90), 10 states have return successors, (92), 7 states have call predecessors, (92), 7 states have call successors, (92) [2023-11-26 10:46:06,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:06,149 INFO L93 Difference]: Finished difference Result 733 states and 1070 transitions. [2023-11-26 10:46:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-26 10:46:06,153 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 7.2272727272727275) internal successors, (159), 21 states have internal predecessors, (159), 7 states have call successors, (90), 5 states have call predecessors, (90), 10 states have return successors, (92), 7 states have call predecessors, (92), 7 states have call successors, (92) Word has length 309 [2023-11-26 10:46:06,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:06,157 INFO L225 Difference]: With dead ends: 733 [2023-11-26 10:46:06,157 INFO L226 Difference]: Without dead ends: 430 [2023-11-26 10:46:06,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 599 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2023-11-26 10:46:06,161 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 1340 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1342 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:06,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1342 Valid, 1102 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-26 10:46:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2023-11-26 10:46:06,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 384. [2023-11-26 10:46:06,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 301 states have (on average 1.3588039867109634) internal successors, (409), 302 states have internal predecessors, (409), 70 states have call successors, (70), 12 states have call predecessors, (70), 12 states have return successors, (70), 69 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-26 10:46:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 549 transitions. [2023-11-26 10:46:06,241 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 549 transitions. Word has length 309 [2023-11-26 10:46:06,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:06,243 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 549 transitions. [2023-11-26 10:46:06,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.2272727272727275) internal successors, (159), 21 states have internal predecessors, (159), 7 states have call successors, (90), 5 states have call predecessors, (90), 10 states have return successors, (92), 7 states have call predecessors, (92), 7 states have call successors, (92) [2023-11-26 10:46:06,244 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 549 transitions. [2023-11-26 10:46:06,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-26 10:46:06,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:06,247 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:06,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:06,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 10:46:06,456 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:06,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:06,456 INFO L85 PathProgramCache]: Analyzing trace with hash -15199552, now seen corresponding path program 1 times [2023-11-26 10:46:06,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:06,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114972420] [2023-11-26 10:46:06,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:06,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:06,528 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:46:06,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239866700] [2023-11-26 10:46:06,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:06,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:06,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:06,545 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:06,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:46:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:06,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 10:46:06,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2835 proven. 60 refuted. 0 times theorem prover too weak. 1429 trivial. 0 not checked. [2023-11-26 10:46:08,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 210 proven. 63 refuted. 0 times theorem prover too weak. 4051 trivial. 0 not checked. [2023-11-26 10:46:11,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:11,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114972420] [2023-11-26 10:46:11,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:46:11,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239866700] [2023-11-26 10:46:11,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239866700] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:11,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:46:11,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2023-11-26 10:46:11,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398605596] [2023-11-26 10:46:11,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:11,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 10:46:11,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:11,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 10:46:11,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2023-11-26 10:46:11,278 INFO L87 Difference]: Start difference. First operand 384 states and 549 transitions. Second operand has 27 states, 26 states have (on average 6.346153846153846) internal successors, (165), 25 states have internal predecessors, (165), 8 states have call successors, (94), 5 states have call predecessors, (94), 8 states have return successors, (94), 8 states have call predecessors, (94), 8 states have call successors, (94) [2023-11-26 10:46:23,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:23,323 INFO L93 Difference]: Finished difference Result 3923 states and 5469 transitions. [2023-11-26 10:46:23,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-11-26 10:46:23,324 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 6.346153846153846) internal successors, (165), 25 states have internal predecessors, (165), 8 states have call successors, (94), 5 states have call predecessors, (94), 8 states have return successors, (94), 8 states have call predecessors, (94), 8 states have call successors, (94) Word has length 309 [2023-11-26 10:46:23,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:23,349 INFO L225 Difference]: With dead ends: 3923 [2023-11-26 10:46:23,349 INFO L226 Difference]: Without dead ends: 3540 [2023-11-26 10:46:23,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 611 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5698 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3676, Invalid=9664, Unknown=0, NotChecked=0, Total=13340 [2023-11-26 10:46:23,357 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 3403 mSDsluCounter, 4483 mSDsCounter, 0 mSdLazyCounter, 3898 mSolverCounterSat, 1622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3404 SdHoareTripleChecker+Valid, 4827 SdHoareTripleChecker+Invalid, 5520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1622 IncrementalHoareTripleChecker+Valid, 3898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:23,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3404 Valid, 4827 Invalid, 5520 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1622 Valid, 3898 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-11-26 10:46:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3540 states. [2023-11-26 10:46:23,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3540 to 1282. [2023-11-26 10:46:23,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1033 states have (on average 1.3581800580832526) internal successors, (1403), 1036 states have internal predecessors, (1403), 209 states have call successors, (209), 39 states have call predecessors, (209), 39 states have return successors, (209), 206 states have call predecessors, (209), 209 states have call successors, (209) [2023-11-26 10:46:23,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1821 transitions. [2023-11-26 10:46:23,696 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1821 transitions. Word has length 309 [2023-11-26 10:46:23,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:23,697 INFO L495 AbstractCegarLoop]: Abstraction has 1282 states and 1821 transitions. [2023-11-26 10:46:23,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 6.346153846153846) internal successors, (165), 25 states have internal predecessors, (165), 8 states have call successors, (94), 5 states have call predecessors, (94), 8 states have return successors, (94), 8 states have call predecessors, (94), 8 states have call successors, (94) [2023-11-26 10:46:23,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1821 transitions. [2023-11-26 10:46:23,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-26 10:46:23,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:23,701 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:23,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-26 10:46:23,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 10:46:23,909 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:23,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:23,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1207824822, now seen corresponding path program 1 times [2023-11-26 10:46:23,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:23,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608974523] [2023-11-26 10:46:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:23,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:23,971 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:46:23,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717583262] [2023-11-26 10:46:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:23,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:23,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:23,973 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:23,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4460357-c0b5-49db-b1c1-820e43b43800/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:46:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:24,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 10:46:24,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 318 proven. 393 refuted. 0 times theorem prover too weak. 3613 trivial. 0 not checked. [2023-11-26 10:46:26,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-11-26 10:46:27,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:27,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608974523] [2023-11-26 10:46:27,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:46:27,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717583262] [2023-11-26 10:46:27,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717583262] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:27,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:46:27,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 14 [2023-11-26 10:46:27,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3832172] [2023-11-26 10:46:27,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:27,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:46:27,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:27,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:46:27,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:46:27,518 INFO L87 Difference]: Start difference. First operand 1282 states and 1821 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) [2023-11-26 10:46:28,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:28,025 INFO L93 Difference]: Finished difference Result 2564 states and 3642 transitions. [2023-11-26 10:46:28,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:46:28,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) Word has length 310 [2023-11-26 10:46:28,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:28,036 INFO L225 Difference]: With dead ends: 2564 [2023-11-26 10:46:28,036 INFO L226 Difference]: Without dead ends: 1283 [2023-11-26 10:46:28,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:46:28,042 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 102 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:28,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 532 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:46:28,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states.