./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-78.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_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/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_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-78.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/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_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/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 ce36ae11817d8408b28b87366201df9141e6e75d787dae6b6223431c24a32438 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:45:03,202 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:45:03,326 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:45:03,339 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:45:03,340 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:45:03,381 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:45:03,382 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:45:03,383 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:45:03,384 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:45:03,389 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:45:03,390 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:45:03,391 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:45:03,392 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:45:03,394 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:45:03,395 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:45:03,395 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:45:03,396 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:45:03,396 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:45:03,397 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:45:03,397 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:45:03,398 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:45:03,398 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:45:03,399 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:45:03,399 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:45:03,400 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:45:03,400 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:45:03,401 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:45:03,402 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:45:03,402 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:45:03,403 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:45:03,404 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:45:03,404 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:45:03,405 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:45:03,405 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:45:03,405 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:45:03,406 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:45:03,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:45:03,406 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:45:03,407 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:45:03,407 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:45:03,407 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:45:03,408 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:45:03,408 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_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce36ae11817d8408b28b87366201df9141e6e75d787dae6b6223431c24a32438 [2023-11-26 10:45:03,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:45:03,785 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:45:03,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:45:03,790 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:45:03,791 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:45:03,793 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-78.i [2023-11-26 10:45:06,966 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:45:07,272 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:45:07,274 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-78.i [2023-11-26 10:45:07,291 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/data/8d91de465/b0f58831ec4e44b1a48be8c363f93e4d/FLAGbf418b5b0 [2023-11-26 10:45:07,307 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/data/8d91de465/b0f58831ec4e44b1a48be8c363f93e4d [2023-11-26 10:45:07,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:45:07,314 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:45:07,317 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:45:07,317 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:45:07,323 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:45:07,323 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:45:07" (1/1) ... [2023-11-26 10:45:07,324 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30baf04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:07, skipping insertion in model container [2023-11-26 10:45:07,325 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:45:07" (1/1) ... [2023-11-26 10:45:07,386 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:45:07,552 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_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-78.i[916,929] [2023-11-26 10:45:07,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:45:07,797 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:45:07,815 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_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-78.i[916,929] [2023-11-26 10:45:07,894 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:45:07,931 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:45:07,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:07 WrapperNode [2023-11-26 10:45:07,935 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:45:07,937 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:45:07,937 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:45:07,937 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:45:07,945 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:07" (1/1) ... [2023-11-26 10:45:07,969 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:07" (1/1) ... [2023-11-26 10:45:08,139 INFO L138 Inliner]: procedures = 26, calls = 69, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 474 [2023-11-26 10:45:08,140 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:45:08,141 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:45:08,141 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:45:08,141 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:45:08,158 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:07" (1/1) ... [2023-11-26 10:45:08,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:07" (1/1) ... [2023-11-26 10:45:08,177 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:07" (1/1) ... [2023-11-26 10:45:08,240 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 10:45:08,241 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:07" (1/1) ... [2023-11-26 10:45:08,241 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:07" (1/1) ... [2023-11-26 10:45:08,260 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:07" (1/1) ... [2023-11-26 10:45:08,266 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:07" (1/1) ... [2023-11-26 10:45:08,273 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:07" (1/1) ... [2023-11-26 10:45:08,281 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:07" (1/1) ... [2023-11-26 10:45:08,292 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:45:08,293 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:45:08,293 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:45:08,293 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:45:08,294 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:07" (1/1) ... [2023-11-26 10:45:08,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:45:08,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:08,327 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:45:08,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:45:08,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:45:08,372 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:45:08,372 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:45:08,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:45:08,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:45:08,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:45:08,536 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:45:08,540 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:45:09,756 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:45:09,822 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:45:09,823 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:45:09,824 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:45:09 BoogieIcfgContainer [2023-11-26 10:45:09,824 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:45:09,827 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:45:09,827 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:45:09,831 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:45:09,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:45:07" (1/3) ... [2023-11-26 10:45:09,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6a44eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:45:09, skipping insertion in model container [2023-11-26 10:45:09,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:07" (2/3) ... [2023-11-26 10:45:09,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6a44eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:45:09, skipping insertion in model container [2023-11-26 10:45:09,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:45:09" (3/3) ... [2023-11-26 10:45:09,838 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-78.i [2023-11-26 10:45:09,859 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:45:09,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:45:09,923 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:45:09,933 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;@387548e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:45:09,934 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:45:09,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 188 states, 129 states have (on average 1.573643410852713) internal successors, (203), 130 states have internal predecessors, (203), 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 10:45:09,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2023-11-26 10:45:09,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:09,978 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:09,978 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:09,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:09,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1301773186, now seen corresponding path program 1 times [2023-11-26 10:45:09,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:09,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100244977] [2023-11-26 10:45:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:09,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:10,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:10,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100244977] [2023-11-26 10:45:10,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:45:10,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321183934] [2023-11-26 10:45:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:10,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:10,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:10,534 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:10,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:45:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:10,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 10:45:10,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:11,020 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 10:45:11,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:11,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321183934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:11,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:11,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:45:11,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279742704] [2023-11-26 10:45:11,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:11,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:45:11,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:11,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:45:11,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:45:11,084 INFO L87 Difference]: Start difference. First operand has 188 states, 129 states have (on average 1.573643410852713) internal successors, (203), 130 states have internal predecessors, (203), 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 43.0) internal successors, (86), 2 states have internal predecessors, (86), 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 10:45:11,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:11,199 INFO L93 Difference]: Finished difference Result 373 states and 684 transitions. [2023-11-26 10:45:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:45:11,202 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 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 361 [2023-11-26 10:45:11,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:11,218 INFO L225 Difference]: With dead ends: 373 [2023-11-26 10:45:11,219 INFO L226 Difference]: Without dead ends: 186 [2023-11-26 10:45:11,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:45:11,237 INFO L413 NwaCegarLoop]: 307 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, 307 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:11,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 307 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:11,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-11-26 10:45:11,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2023-11-26 10:45:11,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 128 states have (on average 1.546875) internal successors, (198), 128 states have internal predecessors, (198), 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 10:45:11,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 310 transitions. [2023-11-26 10:45:11,320 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 310 transitions. Word has length 361 [2023-11-26 10:45:11,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:11,322 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 310 transitions. [2023-11-26 10:45:11,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 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 10:45:11,323 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 310 transitions. [2023-11-26 10:45:11,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2023-11-26 10:45:11,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:11,341 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:11,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:11,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 10:45:11,549 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:11,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:11,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1165348862, now seen corresponding path program 1 times [2023-11-26 10:45:11,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:11,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249739946] [2023-11-26 10:45:11,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:11,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:11,678 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:11,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202678068] [2023-11-26 10:45:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:11,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:11,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:11,695 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:11,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:45:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:12,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:45:12,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:12,178 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 10:45:12,178 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:12,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:12,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249739946] [2023-11-26 10:45:12,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:12,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202678068] [2023-11-26 10:45:12,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202678068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:12,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:12,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:45:12,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18522841] [2023-11-26 10:45:12,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:12,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:45:12,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:12,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:45:12,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:12,190 INFO L87 Difference]: Start difference. First operand 186 states and 310 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 10:45:12,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:12,386 INFO L93 Difference]: Finished difference Result 553 states and 922 transitions. [2023-11-26 10:45:12,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:45:12,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 361 [2023-11-26 10:45:12,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:12,397 INFO L225 Difference]: With dead ends: 553 [2023-11-26 10:45:12,401 INFO L226 Difference]: Without dead ends: 368 [2023-11-26 10:45:12,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:12,405 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 285 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:12,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 617 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-11-26 10:45:12,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 364. [2023-11-26 10:45:12,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 249 states have (on average 1.502008032128514) internal successors, (374), 249 states have internal predecessors, (374), 112 states have call successors, (112), 2 states have call predecessors, (112), 2 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-26 10:45:12,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 598 transitions. [2023-11-26 10:45:12,514 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 598 transitions. Word has length 361 [2023-11-26 10:45:12,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:12,521 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 598 transitions. [2023-11-26 10:45:12,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 10:45:12,521 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 598 transitions. [2023-11-26 10:45:12,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2023-11-26 10:45:12,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:12,532 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:12,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:12,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:12,741 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:12,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:12,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1140274746, now seen corresponding path program 1 times [2023-11-26 10:45:12,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:12,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035407907] [2023-11-26 10:45:12,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:12,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:12,927 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:12,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219315939] [2023-11-26 10:45:12,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:12,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:12,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:12,939 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:12,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:45:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:13,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:45:13,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:13,411 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 10:45:13,411 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:13,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:13,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035407907] [2023-11-26 10:45:13,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:13,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219315939] [2023-11-26 10:45:13,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219315939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:13,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:13,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:45:13,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191864072] [2023-11-26 10:45:13,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:13,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:45:13,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:13,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:45:13,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:13,418 INFO L87 Difference]: Start difference. First operand 364 states and 598 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 10:45:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:13,613 INFO L93 Difference]: Finished difference Result 737 states and 1211 transitions. [2023-11-26 10:45:13,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:45:13,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 362 [2023-11-26 10:45:13,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:13,620 INFO L225 Difference]: With dead ends: 737 [2023-11-26 10:45:13,620 INFO L226 Difference]: Without dead ends: 374 [2023-11-26 10:45:13,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:13,623 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 271 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:13,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 743 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:13,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-26 10:45:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 370. [2023-11-26 10:45:13,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 255 states have (on average 1.4784313725490197) internal successors, (377), 255 states have internal predecessors, (377), 112 states have call successors, (112), 2 states have call predecessors, (112), 2 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-26 10:45:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 601 transitions. [2023-11-26 10:45:13,672 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 601 transitions. Word has length 362 [2023-11-26 10:45:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:13,674 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 601 transitions. [2023-11-26 10:45:13,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 10:45:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 601 transitions. [2023-11-26 10:45:13,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2023-11-26 10:45:13,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:13,679 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:13,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:13,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:13,891 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:13,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:13,892 INFO L85 PathProgramCache]: Analyzing trace with hash -548668996, now seen corresponding path program 1 times [2023-11-26 10:45:13,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:13,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513843624] [2023-11-26 10:45:13,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:13,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:13,999 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:13,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076023353] [2023-11-26 10:45:13,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:14,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:14,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:14,001 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:14,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:45:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:14,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:45:14,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 1329 proven. 18 refuted. 0 times theorem prover too weak. 4813 trivial. 0 not checked. [2023-11-26 10:45:14,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 147 proven. 18 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-26 10:45:14,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:14,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513843624] [2023-11-26 10:45:14,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:14,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076023353] [2023-11-26 10:45:14,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076023353] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:14,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:45:14,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 10:45:14,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702177069] [2023-11-26 10:45:14,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:14,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:45:14,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:14,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:45:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:45:14,927 INFO L87 Difference]: Start difference. First operand 370 states and 601 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 2 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-26 10:45:15,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:15,539 INFO L93 Difference]: Finished difference Result 753 states and 1213 transitions. [2023-11-26 10:45:15,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:45:15,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 2 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) Word has length 362 [2023-11-26 10:45:15,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:15,546 INFO L225 Difference]: With dead ends: 753 [2023-11-26 10:45:15,546 INFO L226 Difference]: Without dead ends: 384 [2023-11-26 10:45:15,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 716 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:45:15,549 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 385 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:15,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 600 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:45:15,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-11-26 10:45:15,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 376. [2023-11-26 10:45:15,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 259 states have (on average 1.4555984555984556) internal successors, (377), 259 states have internal predecessors, (377), 112 states have call successors, (112), 4 states have call predecessors, (112), 4 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-26 10:45:15,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 601 transitions. [2023-11-26 10:45:15,634 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 601 transitions. Word has length 362 [2023-11-26 10:45:15,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:15,636 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 601 transitions. [2023-11-26 10:45:15,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 2 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-26 10:45:15,637 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 601 transitions. [2023-11-26 10:45:15,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2023-11-26 10:45:15,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:15,647 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:15,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:15,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:15,864 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:15,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:15,865 INFO L85 PathProgramCache]: Analyzing trace with hash -128314313, now seen corresponding path program 1 times [2023-11-26 10:45:15,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:15,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155746459] [2023-11-26 10:45:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:15,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:15,977 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:15,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923442906] [2023-11-26 10:45:15,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:15,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:15,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:15,979 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:15,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:45:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:16,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 10:45:16,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:16,560 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 10:45:16,561 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:16,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:16,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155746459] [2023-11-26 10:45:16,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:16,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923442906] [2023-11-26 10:45:16,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923442906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:16,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:16,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:45:16,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073252319] [2023-11-26 10:45:16,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:16,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:45:16,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:16,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:45:16,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:45:16,566 INFO L87 Difference]: Start difference. First operand 376 states and 601 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 10:45:18,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:18,599 INFO L93 Difference]: Finished difference Result 2280 states and 3626 transitions. [2023-11-26 10:45:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:45:18,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 363 [2023-11-26 10:45:18,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:18,619 INFO L225 Difference]: With dead ends: 2280 [2023-11-26 10:45:18,619 INFO L226 Difference]: Without dead ends: 1905 [2023-11-26 10:45:18,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:45:18,623 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 1670 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 743 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:18,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1670 Valid, 1318 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [743 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-26 10:45:18,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2023-11-26 10:45:18,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1762. [2023-11-26 10:45:18,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1206 states have (on average 1.4361525704809286) internal successors, (1732), 1213 states have internal predecessors, (1732), 536 states have call successors, (536), 19 states have call predecessors, (536), 19 states have return successors, (536), 529 states have call predecessors, (536), 536 states have call successors, (536) [2023-11-26 10:45:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 2804 transitions. [2023-11-26 10:45:18,960 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 2804 transitions. Word has length 363 [2023-11-26 10:45:18,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:18,962 INFO L495 AbstractCegarLoop]: Abstraction has 1762 states and 2804 transitions. [2023-11-26 10:45:18,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 10:45:18,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 2804 transitions. [2023-11-26 10:45:18,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2023-11-26 10:45:18,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:18,969 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:18,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:19,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:19,184 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:19,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:19,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1951473805, now seen corresponding path program 1 times [2023-11-26 10:45:19,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:19,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888623899] [2023-11-26 10:45:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:19,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:19,258 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:19,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232398277] [2023-11-26 10:45:19,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:19,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:19,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:19,260 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:19,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:45:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:19,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:45:19,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:20,329 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 10:45:20,329 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:20,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:20,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888623899] [2023-11-26 10:45:20,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:20,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232398277] [2023-11-26 10:45:20,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232398277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:20,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:20,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:45:20,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173529131] [2023-11-26 10:45:20,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:20,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:45:20,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:20,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:45:20,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:20,335 INFO L87 Difference]: Start difference. First operand 1762 states and 2804 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 10:45:20,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:20,730 INFO L93 Difference]: Finished difference Result 4422 states and 7039 transitions. [2023-11-26 10:45:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:45:20,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 364 [2023-11-26 10:45:20,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:20,760 INFO L225 Difference]: With dead ends: 4422 [2023-11-26 10:45:20,760 INFO L226 Difference]: Without dead ends: 2761 [2023-11-26 10:45:20,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:20,773 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 119 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:20,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 603 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:20,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2023-11-26 10:45:21,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2759. [2023-11-26 10:45:21,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2759 states, 1905 states have (on average 1.4320209973753282) internal successors, (2728), 1916 states have internal predecessors, (2728), 824 states have call successors, (824), 29 states have call predecessors, (824), 29 states have return successors, (824), 813 states have call predecessors, (824), 824 states have call successors, (824) [2023-11-26 10:45:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2759 states to 2759 states and 4376 transitions. [2023-11-26 10:45:21,292 INFO L78 Accepts]: Start accepts. Automaton has 2759 states and 4376 transitions. Word has length 364 [2023-11-26 10:45:21,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:21,294 INFO L495 AbstractCegarLoop]: Abstraction has 2759 states and 4376 transitions. [2023-11-26 10:45:21,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 10:45:21,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2759 states and 4376 transitions. [2023-11-26 10:45:21,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2023-11-26 10:45:21,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:21,300 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:21,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:21,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 10:45:21,509 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:21,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:21,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1356281473, now seen corresponding path program 1 times [2023-11-26 10:45:21,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:21,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942054905] [2023-11-26 10:45:21,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:21,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:21,575 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:21,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331672657] [2023-11-26 10:45:21,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:21,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:21,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:21,577 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:21,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:45:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:21,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 10:45:22,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3789 proven. 375 refuted. 0 times theorem prover too weak. 1996 trivial. 0 not checked. [2023-11-26 10:45:25,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 81 proven. 246 refuted. 0 times theorem prover too weak. 5833 trivial. 0 not checked. [2023-11-26 10:45:28,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:28,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942054905] [2023-11-26 10:45:28,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:28,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331672657] [2023-11-26 10:45:28,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331672657] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:28,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:45:28,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2023-11-26 10:45:28,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400447680] [2023-11-26 10:45:28,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:28,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-26 10:45:28,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:28,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-26 10:45:28,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2023-11-26 10:45:28,768 INFO L87 Difference]: Start difference. First operand 2759 states and 4376 transitions. Second operand has 30 states, 30 states have (on average 6.1) internal successors, (183), 30 states have internal predecessors, (183), 9 states have call successors, (109), 5 states have call predecessors, (109), 10 states have return successors, (110), 9 states have call predecessors, (110), 9 states have call successors, (110) [2023-11-26 10:45:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:34,450 INFO L93 Difference]: Finished difference Result 10751 states and 16501 transitions. [2023-11-26 10:45:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-26 10:45:34,452 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.1) internal successors, (183), 30 states have internal predecessors, (183), 9 states have call successors, (109), 5 states have call predecessors, (109), 10 states have return successors, (110), 9 states have call predecessors, (110), 9 states have call successors, (110) Word has length 365 [2023-11-26 10:45:34,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:34,514 INFO L225 Difference]: With dead ends: 10751 [2023-11-26 10:45:34,516 INFO L226 Difference]: Without dead ends: 8093 [2023-11-26 10:45:34,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 768 GetRequests, 706 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=942, Invalid=3090, Unknown=0, NotChecked=0, Total=4032 [2023-11-26 10:45:34,529 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 2843 mSDsluCounter, 1739 mSDsCounter, 0 mSdLazyCounter, 3033 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2846 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 3175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 3033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:34,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2846 Valid, 1942 Invalid, 3175 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [142 Valid, 3033 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-26 10:45:34,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8093 states. [2023-11-26 10:45:35,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8093 to 5849. [2023-11-26 10:45:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5849 states, 4702 states have (on average 1.4529987239472564) internal successors, (6832), 4745 states have internal predecessors, (6832), 984 states have call successors, (984), 162 states have call predecessors, (984), 162 states have return successors, (984), 941 states have call predecessors, (984), 984 states have call successors, (984) [2023-11-26 10:45:35,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5849 states to 5849 states and 8800 transitions. [2023-11-26 10:45:35,177 INFO L78 Accepts]: Start accepts. Automaton has 5849 states and 8800 transitions. Word has length 365 [2023-11-26 10:45:35,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:35,178 INFO L495 AbstractCegarLoop]: Abstraction has 5849 states and 8800 transitions. [2023-11-26 10:45:35,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.1) internal successors, (183), 30 states have internal predecessors, (183), 9 states have call successors, (109), 5 states have call predecessors, (109), 10 states have return successors, (110), 9 states have call predecessors, (110), 9 states have call successors, (110) [2023-11-26 10:45:35,179 INFO L276 IsEmpty]: Start isEmpty. Operand 5849 states and 8800 transitions. [2023-11-26 10:45:35,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2023-11-26 10:45:35,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:35,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:35,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:35,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 10:45:35,396 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:35,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:35,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2094680321, now seen corresponding path program 1 times [2023-11-26 10:45:35,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:35,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393612036] [2023-11-26 10:45:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:35,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:35,460 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:35,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306886810] [2023-11-26 10:45:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:35,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:35,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:35,467 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:35,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fbdad2-30d7-4fe1-bf35-4314761b1d0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:45:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:35,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-26 10:45:35,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2415 proven. 513 refuted. 0 times theorem prover too weak. 3232 trivial. 0 not checked. [2023-11-26 10:45:38,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 111 proven. 375 refuted. 0 times theorem prover too weak. 5674 trivial. 0 not checked. [2023-11-26 10:45:43,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:43,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393612036] [2023-11-26 10:45:43,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:43,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306886810] [2023-11-26 10:45:43,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306886810] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:43,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:45:43,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2023-11-26 10:45:43,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253324316] [2023-11-26 10:45:43,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:43,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-26 10:45:43,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:43,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-26 10:45:43,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2023-11-26 10:45:43,007 INFO L87 Difference]: Start difference. First operand 5849 states and 8800 transitions. Second operand has 34 states, 33 states have (on average 5.636363636363637) internal successors, (186), 32 states have internal predecessors, (186), 8 states have call successors, (108), 5 states have call predecessors, (108), 11 states have return successors, (109), 8 states have call predecessors, (109), 8 states have call successors, (109)