./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-47.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/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_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-47.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/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_bcfd4cac-19ec-49fe-acd7-f32450843ae0/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 420537b9b13760dd610d470b3d7843b58ac95d81a28cc2456f8b6dc502272279 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:53:01,125 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:53:01,238 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:53:01,249 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:53:01,250 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:53:01,288 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:53:01,291 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:53:01,292 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:53:01,293 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:53:01,300 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:53:01,301 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:53:01,302 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:53:01,303 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:53:01,305 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:53:01,305 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:53:01,306 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:53:01,306 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:53:01,307 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:53:01,307 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:53:01,307 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:53:01,308 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:53:01,308 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:53:01,309 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:53:01,309 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:53:01,310 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:53:01,310 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:53:01,310 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:53:01,311 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:53:01,312 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:53:01,312 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:53:01,313 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:53:01,314 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:53:01,314 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:53:01,314 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:53:01,314 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:53:01,315 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:53:01,315 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:53:01,315 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:53:01,315 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:53:01,316 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:53:01,316 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:53:01,316 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:53:01,317 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_bcfd4cac-19ec-49fe-acd7-f32450843ae0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 420537b9b13760dd610d470b3d7843b58ac95d81a28cc2456f8b6dc502272279 [2023-11-26 11:53:01,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:53:01,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:53:01,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:53:01,625 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:53:01,625 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:53:01,627 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-47.i [2023-11-26 11:53:04,764 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:53:05,083 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:53:05,084 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-47.i [2023-11-26 11:53:05,097 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/data/dd5d8ff98/ae5f73106a1f4878a4759045af4b5aeb/FLAG8b81c3be9 [2023-11-26 11:53:05,115 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/data/dd5d8ff98/ae5f73106a1f4878a4759045af4b5aeb [2023-11-26 11:53:05,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:53:05,119 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:53:05,120 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:53:05,121 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:53:05,127 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:53:05,127 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:53:05" (1/1) ... [2023-11-26 11:53:05,129 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@375e8fd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:05, skipping insertion in model container [2023-11-26 11:53:05,129 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:53:05" (1/1) ... [2023-11-26 11:53:05,179 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:53:05,368 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_bcfd4cac-19ec-49fe-acd7-f32450843ae0/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-47.i[916,929] [2023-11-26 11:53:05,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:53:05,490 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:53:05,503 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_bcfd4cac-19ec-49fe-acd7-f32450843ae0/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-47.i[916,929] [2023-11-26 11:53:05,564 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:53:05,583 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:53:05,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:05 WrapperNode [2023-11-26 11:53:05,583 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:53:05,585 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:53:05,585 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:53:05,585 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:53:05,593 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:05" (1/1) ... [2023-11-26 11:53:05,610 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:05" (1/1) ... [2023-11-26 11:53:05,694 INFO L138 Inliner]: procedures = 26, calls = 69, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 406 [2023-11-26 11:53:05,695 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:53:05,696 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:53:05,696 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:53:05,696 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:53:05,719 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:05" (1/1) ... [2023-11-26 11:53:05,720 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:05" (1/1) ... [2023-11-26 11:53:05,728 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:05" (1/1) ... [2023-11-26 11:53:05,805 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:53:05,805 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:05" (1/1) ... [2023-11-26 11:53:05,805 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:05" (1/1) ... [2023-11-26 11:53:05,839 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:05" (1/1) ... [2023-11-26 11:53:05,844 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:05" (1/1) ... [2023-11-26 11:53:05,849 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:05" (1/1) ... [2023-11-26 11:53:05,858 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:05" (1/1) ... [2023-11-26 11:53:05,878 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:53:05,879 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:53:05,880 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:53:05,880 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:53:05,881 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:05" (1/1) ... [2023-11-26 11:53:05,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:53:05,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:05,915 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:05,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:53:05,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:53:05,960 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:53:05,961 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:53:05,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:53:05,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:53:05,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:53:06,126 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:53:06,129 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:53:06,803 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:53:06,837 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:53:06,838 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:53:06,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:53:06 BoogieIcfgContainer [2023-11-26 11:53:06,838 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:53:06,841 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:53:06,841 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:53:06,845 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:53:06,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:53:05" (1/3) ... [2023-11-26 11:53:06,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d63678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:53:06, skipping insertion in model container [2023-11-26 11:53:06,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:05" (2/3) ... [2023-11-26 11:53:06,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d63678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:53:06, skipping insertion in model container [2023-11-26 11:53:06,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:53:06" (3/3) ... [2023-11-26 11:53:06,848 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-100_file-47.i [2023-11-26 11:53:06,869 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:53:06,869 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:53:06,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:53:06,947 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;@5ae0bc85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:53:06,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:53:06,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 157 states, 98 states have (on average 1.5510204081632653) internal successors, (152), 99 states have internal predecessors, (152), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-26 11:53:07,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2023-11-26 11:53:07,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:07,088 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:07,088 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:07,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:07,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1085472584, now seen corresponding path program 1 times [2023-11-26 11:53:07,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:07,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745246765] [2023-11-26 11:53:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:07,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:07,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:07,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745246765] [2023-11-26 11:53:07,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:53:07,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896574212] [2023-11-26 11:53:07,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:07,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:07,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:07,531 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:07,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:53:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:07,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:53:07,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 6050 trivial. 0 not checked. [2023-11-26 11:53:07,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:07,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896574212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:07,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:07,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:53:07,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607209836] [2023-11-26 11:53:07,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:07,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:53:07,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:07,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:53:07,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:53:07,998 INFO L87 Difference]: Start difference. First operand has 157 states, 98 states have (on average 1.5510204081632653) internal successors, (152), 99 states have internal predecessors, (152), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 2 states have call successors, (56) [2023-11-26 11:53:08,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:08,072 INFO L93 Difference]: Finished difference Result 311 states and 582 transitions. [2023-11-26 11:53:08,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:53:08,075 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 2 states have call successors, (56) Word has length 343 [2023-11-26 11:53:08,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:08,086 INFO L225 Difference]: With dead ends: 311 [2023-11-26 11:53:08,086 INFO L226 Difference]: Without dead ends: 155 [2023-11-26 11:53:08,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:53:08,100 INFO L413 NwaCegarLoop]: 252 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, 252 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:08,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 252 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:53:08,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-26 11:53:08,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2023-11-26 11:53:08,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 97 states have (on average 1.4742268041237114) internal successors, (143), 97 states have internal predecessors, (143), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-26 11:53:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 255 transitions. [2023-11-26 11:53:08,186 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 255 transitions. Word has length 343 [2023-11-26 11:53:08,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:08,189 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 255 transitions. [2023-11-26 11:53:08,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 2 states have call successors, (56) [2023-11-26 11:53:08,190 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 255 transitions. [2023-11-26 11:53:08,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-26 11:53:08,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:08,202 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:08,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:08,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:08,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:08,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:08,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1757693242, now seen corresponding path program 1 times [2023-11-26 11:53:08,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:08,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851883351] [2023-11-26 11:53:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:08,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:08,543 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:08,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768163801] [2023-11-26 11:53:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:08,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:08,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:08,554 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:08,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:53:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:08,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:53:08,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 483 proven. 159 refuted. 0 times theorem prover too weak. 5518 trivial. 0 not checked. [2023-11-26 11:53:09,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 6 proven. 159 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-26 11:53:10,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:10,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851883351] [2023-11-26 11:53:10,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:10,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768163801] [2023-11-26 11:53:10,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768163801] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:10,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:53:10,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-26 11:53:10,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810173369] [2023-11-26 11:53:10,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:10,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:53:10,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:10,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:53:10,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:53:10,221 INFO L87 Difference]: Start difference. First operand 155 states and 255 transitions. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 3 states have call successors, (109), 2 states have call predecessors, (109), 4 states have return successors, (110), 3 states have call predecessors, (110), 3 states have call successors, (110) [2023-11-26 11:53:10,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:10,845 INFO L93 Difference]: Finished difference Result 315 states and 514 transitions. [2023-11-26 11:53:10,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:53:10,847 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 3 states have call successors, (109), 2 states have call predecessors, (109), 4 states have return successors, (110), 3 states have call predecessors, (110), 3 states have call successors, (110) Word has length 344 [2023-11-26 11:53:10,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:10,852 INFO L225 Difference]: With dead ends: 315 [2023-11-26 11:53:10,853 INFO L226 Difference]: Without dead ends: 161 [2023-11-26 11:53:10,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:53:10,860 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 218 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:10,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 755 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:53:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-26 11:53:10,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2023-11-26 11:53:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 100 states have (on average 1.45) internal successors, (145), 100 states have internal predecessors, (145), 56 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-26 11:53:10,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 257 transitions. [2023-11-26 11:53:10,932 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 257 transitions. Word has length 344 [2023-11-26 11:53:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:10,936 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 257 transitions. [2023-11-26 11:53:10,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 3 states have call successors, (109), 2 states have call predecessors, (109), 4 states have return successors, (110), 3 states have call predecessors, (110), 3 states have call successors, (110) [2023-11-26 11:53:10,937 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 257 transitions. [2023-11-26 11:53:10,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2023-11-26 11:53:10,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:10,944 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:10,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:11,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:11,152 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:11,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:11,153 INFO L85 PathProgramCache]: Analyzing trace with hash -350644965, now seen corresponding path program 1 times [2023-11-26 11:53:11,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:11,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494350195] [2023-11-26 11:53:11,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:11,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:11,245 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:11,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919441221] [2023-11-26 11:53:11,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:11,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:11,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:11,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:11,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:53:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:11,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:53:11,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-26 11:53:11,527 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:11,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:11,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494350195] [2023-11-26 11:53:11,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:11,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919441221] [2023-11-26 11:53:11,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919441221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:11,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:11,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:11,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519102136] [2023-11-26 11:53:11,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:11,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:11,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:11,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:11,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:11,534 INFO L87 Difference]: Start difference. First operand 159 states and 257 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-26 11:53:11,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:11,644 INFO L93 Difference]: Finished difference Result 467 states and 756 transitions. [2023-11-26 11:53:11,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:11,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 345 [2023-11-26 11:53:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:11,653 INFO L225 Difference]: With dead ends: 467 [2023-11-26 11:53:11,654 INFO L226 Difference]: Without dead ends: 309 [2023-11-26 11:53:11,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:11,658 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 238 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:11,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 524 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:53:11,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-11-26 11:53:11,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 163. [2023-11-26 11:53:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 104 states have (on average 1.4326923076923077) internal successors, (149), 104 states have internal predecessors, (149), 56 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-26 11:53:11,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 261 transitions. [2023-11-26 11:53:11,735 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 261 transitions. Word has length 345 [2023-11-26 11:53:11,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:11,739 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 261 transitions. [2023-11-26 11:53:11,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-26 11:53:11,740 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 261 transitions. [2023-11-26 11:53:11,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2023-11-26 11:53:11,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:11,747 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:11,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:11,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-26 11:53:11,956 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:11,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:11,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1361762215, now seen corresponding path program 1 times [2023-11-26 11:53:11,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:11,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25404528] [2023-11-26 11:53:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:11,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:12,035 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:12,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155880486] [2023-11-26 11:53:12,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:12,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:12,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:12,037 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:12,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:53:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:12,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:53:12,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2485 proven. 120 refuted. 0 times theorem prover too weak. 3555 trivial. 0 not checked. [2023-11-26 11:53:12,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 45 proven. 120 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-26 11:53:13,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:13,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25404528] [2023-11-26 11:53:13,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:13,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155880486] [2023-11-26 11:53:13,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155880486] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:13,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:53:13,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-26 11:53:13,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700600189] [2023-11-26 11:53:13,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:13,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:53:13,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:13,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:53:13,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:53:13,237 INFO L87 Difference]: Start difference. First operand 163 states and 261 transitions. Second operand has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 2 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) [2023-11-26 11:53:14,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:14,638 INFO L93 Difference]: Finished difference Result 678 states and 1070 transitions. [2023-11-26 11:53:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-26 11:53:14,640 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 2 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) Word has length 345 [2023-11-26 11:53:14,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:14,651 INFO L225 Difference]: With dead ends: 678 [2023-11-26 11:53:14,651 INFO L226 Difference]: Without dead ends: 516 [2023-11-26 11:53:14,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 682 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2023-11-26 11:53:14,657 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 449 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:14,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 1296 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:53:14,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2023-11-26 11:53:14,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 329. [2023-11-26 11:53:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 194 states have (on average 1.3195876288659794) internal successors, (256), 196 states have internal predecessors, (256), 127 states have call successors, (127), 7 states have call predecessors, (127), 7 states have return successors, (127), 125 states have call predecessors, (127), 127 states have call successors, (127) [2023-11-26 11:53:14,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 510 transitions. [2023-11-26 11:53:14,797 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 510 transitions. Word has length 345 [2023-11-26 11:53:14,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:14,799 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 510 transitions. [2023-11-26 11:53:14,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 2 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) [2023-11-26 11:53:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 510 transitions. [2023-11-26 11:53:14,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2023-11-26 11:53:14,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:14,808 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:14,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:15,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:15,023 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:15,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:15,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1244261339, now seen corresponding path program 1 times [2023-11-26 11:53:15,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:15,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729573720] [2023-11-26 11:53:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:15,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:15,072 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:15,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274267822] [2023-11-26 11:53:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:15,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:15,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:15,074 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:15,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:53:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:15,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:53:15,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-26 11:53:15,370 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:15,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:15,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729573720] [2023-11-26 11:53:15,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:15,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274267822] [2023-11-26 11:53:15,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274267822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:15,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:15,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:15,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66567955] [2023-11-26 11:53:15,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:15,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:15,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:15,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:15,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:15,375 INFO L87 Difference]: Start difference. First operand 329 states and 510 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-26 11:53:15,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:15,531 INFO L93 Difference]: Finished difference Result 796 states and 1240 transitions. [2023-11-26 11:53:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:15,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 345 [2023-11-26 11:53:15,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:15,539 INFO L225 Difference]: With dead ends: 796 [2023-11-26 11:53:15,539 INFO L226 Difference]: Without dead ends: 496 [2023-11-26 11:53:15,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:15,542 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 237 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:15,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 685 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:53:15,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2023-11-26 11:53:15,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 352. [2023-11-26 11:53:15,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 217 states have (on average 1.3133640552995391) internal successors, (285), 219 states have internal predecessors, (285), 127 states have call successors, (127), 7 states have call predecessors, (127), 7 states have return successors, (127), 125 states have call predecessors, (127), 127 states have call successors, (127) [2023-11-26 11:53:15,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 539 transitions. [2023-11-26 11:53:15,635 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 539 transitions. Word has length 345 [2023-11-26 11:53:15,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:15,636 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 539 transitions. [2023-11-26 11:53:15,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-26 11:53:15,637 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 539 transitions. [2023-11-26 11:53:15,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2023-11-26 11:53:15,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:15,644 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:15,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:15,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:15,852 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:15,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:15,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1176772140, now seen corresponding path program 1 times [2023-11-26 11:53:15,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:15,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332686108] [2023-11-26 11:53:15,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:15,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:15,909 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:15,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916925597] [2023-11-26 11:53:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:15,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:15,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:15,912 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:15,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:53:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:16,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:53:16,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2079 proven. 33 refuted. 0 times theorem prover too weak. 4048 trivial. 0 not checked. [2023-11-26 11:53:16,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 132 proven. 33 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-26 11:53:17,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:17,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332686108] [2023-11-26 11:53:17,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:17,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916925597] [2023-11-26 11:53:17,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916925597] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:17,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:53:17,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-26 11:53:17,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594792218] [2023-11-26 11:53:17,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:17,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:53:17,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:17,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:53:17,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:53:17,362 INFO L87 Difference]: Start difference. First operand 352 states and 539 transitions. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 4 states have call successors, (112), 3 states have call predecessors, (112), 5 states have return successors, (112), 4 states have call predecessors, (112), 4 states have call successors, (112) [2023-11-26 11:53:18,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:18,619 INFO L93 Difference]: Finished difference Result 1262 states and 1932 transitions. [2023-11-26 11:53:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:53:18,620 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 4 states have call successors, (112), 3 states have call predecessors, (112), 5 states have return successors, (112), 4 states have call predecessors, (112), 4 states have call successors, (112) Word has length 346 [2023-11-26 11:53:18,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:18,628 INFO L225 Difference]: With dead ends: 1262 [2023-11-26 11:53:18,629 INFO L226 Difference]: Without dead ends: 939 [2023-11-26 11:53:18,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 682 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 11:53:18,632 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 748 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:18,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 775 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 11:53:18,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2023-11-26 11:53:18,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 553. [2023-11-26 11:53:18,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 357 states have (on average 1.3361344537815125) internal successors, (477), 359 states have internal predecessors, (477), 183 states have call successors, (183), 12 states have call predecessors, (183), 12 states have return successors, (183), 181 states have call predecessors, (183), 183 states have call successors, (183) [2023-11-26 11:53:18,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 843 transitions. [2023-11-26 11:53:18,813 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 843 transitions. Word has length 346 [2023-11-26 11:53:18,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:18,815 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 843 transitions. [2023-11-26 11:53:18,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 4 states have call successors, (112), 3 states have call predecessors, (112), 5 states have return successors, (112), 4 states have call predecessors, (112), 4 states have call successors, (112) [2023-11-26 11:53:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 843 transitions. [2023-11-26 11:53:18,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2023-11-26 11:53:18,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:18,820 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:18,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:19,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:19,034 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:19,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:19,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1887920646, now seen corresponding path program 1 times [2023-11-26 11:53:19,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:19,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440491320] [2023-11-26 11:53:19,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:19,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:19,084 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:19,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265633535] [2023-11-26 11:53:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:19,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:19,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:19,086 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:19,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:53:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:19,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:53:19,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-26 11:53:20,536 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:20,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:20,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440491320] [2023-11-26 11:53:20,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:20,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265633535] [2023-11-26 11:53:20,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265633535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:20,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:20,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:20,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644796903] [2023-11-26 11:53:20,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:20,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:53:20,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:20,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:53:20,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:53:20,541 INFO L87 Difference]: Start difference. First operand 553 states and 843 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-26 11:53:20,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:20,966 INFO L93 Difference]: Finished difference Result 1261 states and 1929 transitions. [2023-11-26 11:53:20,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:53:20,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 347 [2023-11-26 11:53:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:20,977 INFO L225 Difference]: With dead ends: 1261 [2023-11-26 11:53:20,977 INFO L226 Difference]: Without dead ends: 737 [2023-11-26 11:53:20,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:53:20,981 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 177 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:20,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 724 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:53:20,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2023-11-26 11:53:21,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 531. [2023-11-26 11:53:21,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 351 states have (on average 1.3817663817663817) internal successors, (485), 351 states have internal predecessors, (485), 168 states have call successors, (168), 11 states have call predecessors, (168), 11 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2023-11-26 11:53:21,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 821 transitions. [2023-11-26 11:53:21,141 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 821 transitions. Word has length 347 [2023-11-26 11:53:21,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:21,142 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 821 transitions. [2023-11-26 11:53:21,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-26 11:53:21,143 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 821 transitions. [2023-11-26 11:53:21,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2023-11-26 11:53:21,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:21,146 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:21,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-26 11:53:21,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:21,354 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:21,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:21,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2129943058, now seen corresponding path program 1 times [2023-11-26 11:53:21,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:21,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733772684] [2023-11-26 11:53:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:21,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:21,415 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:21,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811885132] [2023-11-26 11:53:21,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:21,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:21,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:21,417 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:21,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcfd4cac-19ec-49fe-acd7-f32450843ae0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:53:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:21,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 11:53:21,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2829 proven. 510 refuted. 0 times theorem prover too weak. 2821 trivial. 0 not checked. [2023-11-26 11:53:25,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 114 proven. 372 refuted. 0 times theorem prover too weak. 5674 trivial. 0 not checked. [2023-11-26 11:53:29,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:29,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733772684] [2023-11-26 11:53:29,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:29,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811885132] [2023-11-26 11:53:29,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811885132] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:29,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:53:29,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2023-11-26 11:53:29,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144426951] [2023-11-26 11:53:29,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:29,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-26 11:53:29,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:29,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-26 11:53:29,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2023-11-26 11:53:29,338 INFO L87 Difference]: Start difference. First operand 531 states and 821 transitions. Second operand has 26 states, 25 states have (on average 6.48) internal successors, (162), 23 states have internal predecessors, (162), 9 states have call successors, (112), 6 states have call predecessors, (112), 11 states have return successors, (112), 9 states have call predecessors, (112), 9 states have call successors, (112) [2023-11-26 11:53:49,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []