./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-70.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_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/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_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-70.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/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_633ad20f-1f02-4b12-ab1e-3488d716e8d1/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 5bc8eacad65ceeb4218fd37d8c2a82533aa57cc0e83e2442712276000d8fd6ae --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:49:45,105 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:49:45,219 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:49:45,231 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:49:45,232 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:49:45,306 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:49:45,307 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:49:45,308 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:49:45,309 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:49:45,314 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:49:45,315 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:49:45,316 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:49:45,317 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:49:45,319 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:49:45,320 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:49:45,320 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:49:45,321 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:49:45,321 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:49:45,322 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:49:45,322 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:49:45,324 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:49:45,325 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:49:45,326 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:49:45,326 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:49:45,327 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:49:45,339 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:49:45,339 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:49:45,340 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:49:45,340 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:49:45,341 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:49:45,341 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:49:45,342 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:45,342 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:49:45,342 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:49:45,343 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:49:45,343 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:49:45,343 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:49:45,344 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:49:45,344 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:49:45,344 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:49:45,345 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:49:45,345 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:49:45,345 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_633ad20f-1f02-4b12-ab1e-3488d716e8d1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bc8eacad65ceeb4218fd37d8c2a82533aa57cc0e83e2442712276000d8fd6ae [2023-11-26 10:49:45,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:49:45,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:49:45,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:49:45,717 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:49:45,718 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:49:45,719 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-70.i [2023-11-26 10:49:48,781 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:49:49,132 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:49:49,136 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-70.i [2023-11-26 10:49:49,154 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/data/fc933066a/e15072a6bf874d208481d5fc7f3e21ae/FLAG42d17db7e [2023-11-26 10:49:49,185 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/data/fc933066a/e15072a6bf874d208481d5fc7f3e21ae [2023-11-26 10:49:49,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:49:49,190 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:49:49,192 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:49,192 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:49:49,199 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:49:49,200 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:49" (1/1) ... [2023-11-26 10:49:49,201 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@620a3bd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:49, skipping insertion in model container [2023-11-26 10:49:49,202 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:49" (1/1) ... [2023-11-26 10:49:49,250 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:49:49,413 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_633ad20f-1f02-4b12-ab1e-3488d716e8d1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-70.i[916,929] [2023-11-26 10:49:49,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:49,595 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:49:49,616 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_633ad20f-1f02-4b12-ab1e-3488d716e8d1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-70.i[916,929] [2023-11-26 10:49:49,731 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:49,758 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:49:49,759 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:49 WrapperNode [2023-11-26 10:49:49,759 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:49,761 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:49:49,761 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:49:49,761 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:49:49,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:49" (1/1) ... [2023-11-26 10:49:49,791 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:49" (1/1) ... [2023-11-26 10:49:49,865 INFO L138 Inliner]: procedures = 26, calls = 104, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 579 [2023-11-26 10:49:49,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:49:49,867 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:49:49,867 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:49:49,867 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:49:49,898 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:49" (1/1) ... [2023-11-26 10:49:49,902 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:49" (1/1) ... [2023-11-26 10:49:49,910 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:49" (1/1) ... [2023-11-26 10:49:49,988 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 10:49:49,989 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:49" (1/1) ... [2023-11-26 10:49:49,989 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:49" (1/1) ... [2023-11-26 10:49:50,034 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:49" (1/1) ... [2023-11-26 10:49:50,056 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:49" (1/1) ... [2023-11-26 10:49:50,064 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:49" (1/1) ... [2023-11-26 10:49:50,077 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:49" (1/1) ... [2023-11-26 10:49:50,101 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:49:50,103 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:49:50,103 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:49:50,104 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:49:50,105 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:49" (1/1) ... [2023-11-26 10:49:50,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:50,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:50,141 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:49:50,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:49:50,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:49:50,183 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:49:50,184 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:49:50,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:49:50,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:49:50,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:49:50,354 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:49:50,356 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:49:51,411 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:49:51,475 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:49:51,476 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:49:51,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:51 BoogieIcfgContainer [2023-11-26 10:49:51,477 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:49:51,479 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:49:51,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:49:51,483 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:49:51,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:49:49" (1/3) ... [2023-11-26 10:49:51,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c265f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:49:51, skipping insertion in model container [2023-11-26 10:49:51,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:49" (2/3) ... [2023-11-26 10:49:51,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c265f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:49:51, skipping insertion in model container [2023-11-26 10:49:51,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:51" (3/3) ... [2023-11-26 10:49:51,487 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-70.i [2023-11-26 10:49:51,508 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:49:51,509 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:49:51,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:49:51,580 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;@73f989a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:49:51,581 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:49:51,588 INFO L276 IsEmpty]: Start isEmpty. Operand has 225 states, 131 states have (on average 1.534351145038168) internal successors, (201), 132 states have internal predecessors, (201), 91 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-26 10:49:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2023-11-26 10:49:51,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:51,665 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:51,666 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:51,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:51,677 INFO L85 PathProgramCache]: Analyzing trace with hash 40601927, now seen corresponding path program 1 times [2023-11-26 10:49:51,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:51,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803900801] [2023-11-26 10:49:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:51,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:52,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:52,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803900801] [2023-11-26 10:49:52,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:49:52,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059578464] [2023-11-26 10:49:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:52,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:52,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:52,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:52,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:49:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:52,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 10:49:52,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 16200 trivial. 0 not checked. [2023-11-26 10:49:52,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:52,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059578464] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:52,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:52,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:49:52,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756585803] [2023-11-26 10:49:52,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:52,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:49:52,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:52,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:49:52,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:49:52,788 INFO L87 Difference]: Start difference. First operand has 225 states, 131 states have (on average 1.534351145038168) internal successors, (201), 132 states have internal predecessors, (201), 91 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 50.0) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (91), 2 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 2 states have call successors, (91) [2023-11-26 10:49:52,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:52,939 INFO L93 Difference]: Finished difference Result 447 states and 855 transitions. [2023-11-26 10:49:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:49:52,942 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 50.0) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (91), 2 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 2 states have call successors, (91) Word has length 550 [2023-11-26 10:49:52,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:52,987 INFO L225 Difference]: With dead ends: 447 [2023-11-26 10:49:52,987 INFO L226 Difference]: Without dead ends: 223 [2023-11-26 10:49:52,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 549 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 10:49:52,998 INFO L413 NwaCegarLoop]: 373 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, 373 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 10:49:53,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 373 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:49:53,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-11-26 10:49:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2023-11-26 10:49:53,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 130 states have (on average 1.4923076923076923) internal successors, (194), 130 states have internal predecessors, (194), 91 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-26 10:49:53,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 376 transitions. [2023-11-26 10:49:53,104 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 376 transitions. Word has length 550 [2023-11-26 10:49:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:53,107 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 376 transitions. [2023-11-26 10:49:53,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 50.0) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (91), 2 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 2 states have call successors, (91) [2023-11-26 10:49:53,109 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 376 transitions. [2023-11-26 10:49:53,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2023-11-26 10:49:53,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:53,134 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:53,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:53,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:53,342 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:53,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:53,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1533183945, now seen corresponding path program 1 times [2023-11-26 10:49:53,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:53,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721592632] [2023-11-26 10:49:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:53,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:53,527 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:53,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642595378] [2023-11-26 10:49:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:53,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:53,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:53,530 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:53,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:49:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:54,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 1212 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:49:54,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-26 10:49:55,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:55,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:55,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721592632] [2023-11-26 10:49:55,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:55,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642595378] [2023-11-26 10:49:55,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642595378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:55,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:55,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:49:55,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606778564] [2023-11-26 10:49:55,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:55,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:55,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:55,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:55,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:55,012 INFO L87 Difference]: Start difference. First operand 223 states and 376 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:49:55,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:55,147 INFO L93 Difference]: Finished difference Result 667 states and 1126 transitions. [2023-11-26 10:49:55,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:55,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 550 [2023-11-26 10:49:55,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:55,163 INFO L225 Difference]: With dead ends: 667 [2023-11-26 10:49:55,163 INFO L226 Difference]: Without dead ends: 445 [2023-11-26 10:49:55,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 548 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 10:49:55,168 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 113 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:55,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 737 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:49:55,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2023-11-26 10:49:55,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 437. [2023-11-26 10:49:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 252 states have (on average 1.4761904761904763) internal successors, (372), 252 states have internal predecessors, (372), 182 states have call successors, (182), 2 states have call predecessors, (182), 2 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) [2023-11-26 10:49:55,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 736 transitions. [2023-11-26 10:49:55,321 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 736 transitions. Word has length 550 [2023-11-26 10:49:55,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:55,327 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 736 transitions. [2023-11-26 10:49:55,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:49:55,327 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 736 transitions. [2023-11-26 10:49:55,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2023-11-26 10:49:55,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:55,339 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:55,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:55,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:55,548 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:55,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:55,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1314329227, now seen corresponding path program 1 times [2023-11-26 10:49:55,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:55,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162648929] [2023-11-26 10:49:55,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:55,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:55,648 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:55,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698574694] [2023-11-26 10:49:55,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:55,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:55,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:55,653 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:55,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:49:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:56,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:49:56,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 1638 proven. 12 refuted. 0 times theorem prover too weak. 14730 trivial. 0 not checked. [2023-11-26 10:49:56,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 258 proven. 12 refuted. 0 times theorem prover too weak. 16110 trivial. 0 not checked. [2023-11-26 10:49:56,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:56,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162648929] [2023-11-26 10:49:56,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:56,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698574694] [2023-11-26 10:49:56,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698574694] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:56,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:56,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-26 10:49:56,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187383739] [2023-11-26 10:49:56,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:56,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:49:56,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:56,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:49:56,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:49:56,886 INFO L87 Difference]: Start difference. First operand 437 states and 736 transitions. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 2 states have call successors, (95), 2 states have call predecessors, (95), 4 states have return successors, (96), 2 states have call predecessors, (96), 2 states have call successors, (96) [2023-11-26 10:49:59,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:59,145 INFO L93 Difference]: Finished difference Result 1793 states and 2983 transitions. [2023-11-26 10:49:59,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-26 10:49:59,147 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 2 states have call successors, (95), 2 states have call predecessors, (95), 4 states have return successors, (96), 2 states have call predecessors, (96), 2 states have call successors, (96) Word has length 550 [2023-11-26 10:49:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:59,161 INFO L225 Difference]: With dead ends: 1793 [2023-11-26 10:49:59,161 INFO L226 Difference]: Without dead ends: 1357 [2023-11-26 10:49:59,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1118 GetRequests, 1092 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2023-11-26 10:49:59,166 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 854 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 1970 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:59,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [943 Valid, 1970 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-26 10:49:59,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2023-11-26 10:49:59,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 887. [2023-11-26 10:49:59,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 514 states have (on average 1.4630350194552528) internal successors, (752), 514 states have internal predecessors, (752), 364 states have call successors, (364), 8 states have call predecessors, (364), 8 states have return successors, (364), 364 states have call predecessors, (364), 364 states have call successors, (364) [2023-11-26 10:49:59,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1480 transitions. [2023-11-26 10:49:59,620 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1480 transitions. Word has length 550 [2023-11-26 10:49:59,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:59,622 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1480 transitions. [2023-11-26 10:49:59,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 2 states have call successors, (95), 2 states have call predecessors, (95), 4 states have return successors, (96), 2 states have call predecessors, (96), 2 states have call successors, (96) [2023-11-26 10:49:59,623 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1480 transitions. [2023-11-26 10:49:59,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2023-11-26 10:49:59,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:59,630 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:59,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:59,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:59,832 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:59,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1056163789, now seen corresponding path program 1 times [2023-11-26 10:49:59,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:59,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728393542] [2023-11-26 10:49:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:59,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:59,971 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:59,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389457168] [2023-11-26 10:49:59,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:59,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:59,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:59,978 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:00,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:50:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:00,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:50:00,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-26 10:50:01,385 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:01,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:01,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728393542] [2023-11-26 10:50:01,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:50:01,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389457168] [2023-11-26 10:50:01,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389457168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:01,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:01,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:01,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423974332] [2023-11-26 10:50:01,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:01,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:50:01,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:01,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:50:01,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:50:01,391 INFO L87 Difference]: Start difference. First operand 887 states and 1480 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:50:02,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:02,152 INFO L93 Difference]: Finished difference Result 3529 states and 5885 transitions. [2023-11-26 10:50:02,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:50:02,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 550 [2023-11-26 10:50:02,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:02,177 INFO L225 Difference]: With dead ends: 3529 [2023-11-26 10:50:02,177 INFO L226 Difference]: Without dead ends: 2643 [2023-11-26 10:50:02,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 547 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:50:02,187 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 491 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:02,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 1233 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:50:02,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2023-11-26 10:50:02,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2631. [2023-11-26 10:50:02,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 1514 states have (on average 1.4478203434610304) internal successors, (2192), 1514 states have internal predecessors, (2192), 1092 states have call successors, (1092), 24 states have call predecessors, (1092), 24 states have return successors, (1092), 1092 states have call predecessors, (1092), 1092 states have call successors, (1092) [2023-11-26 10:50:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 4376 transitions. [2023-11-26 10:50:02,861 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 4376 transitions. Word has length 550 [2023-11-26 10:50:02,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:02,862 INFO L495 AbstractCegarLoop]: Abstraction has 2631 states and 4376 transitions. [2023-11-26 10:50:02,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:50:02,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 4376 transitions. [2023-11-26 10:50:02,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2023-11-26 10:50:02,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:02,870 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:50:02,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:03,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:03,079 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:03,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:03,079 INFO L85 PathProgramCache]: Analyzing trace with hash -808017295, now seen corresponding path program 1 times [2023-11-26 10:50:03,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:03,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979146167] [2023-11-26 10:50:03,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:03,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:03,152 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:50:03,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404741448] [2023-11-26 10:50:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:03,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:03,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:03,154 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:03,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:50:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:03,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:50:03,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-26 10:50:05,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:05,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:05,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979146167] [2023-11-26 10:50:05,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:50:05,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404741448] [2023-11-26 10:50:05,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404741448] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:05,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:05,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:50:05,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261838492] [2023-11-26 10:50:05,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:05,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:05,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:05,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:05,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:05,693 INFO L87 Difference]: Start difference. First operand 2631 states and 4376 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:50:06,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:06,051 INFO L93 Difference]: Finished difference Result 5259 states and 8744 transitions. [2023-11-26 10:50:06,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:06,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 550 [2023-11-26 10:50:06,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:06,073 INFO L225 Difference]: With dead ends: 5259 [2023-11-26 10:50:06,073 INFO L226 Difference]: Without dead ends: 2629 [2023-11-26 10:50:06,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 548 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 10:50:06,084 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 121 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:06,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 854 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:50:06,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2023-11-26 10:50:06,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 1755. [2023-11-26 10:50:06,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1010 states have (on average 1.4475247524752475) internal successors, (1462), 1010 states have internal predecessors, (1462), 728 states have call successors, (728), 16 states have call predecessors, (728), 16 states have return successors, (728), 728 states have call predecessors, (728), 728 states have call successors, (728) [2023-11-26 10:50:06,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 2918 transitions. [2023-11-26 10:50:06,558 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 2918 transitions. Word has length 550 [2023-11-26 10:50:06,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:06,560 INFO L495 AbstractCegarLoop]: Abstraction has 1755 states and 2918 transitions. [2023-11-26 10:50:06,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-26 10:50:06,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 2918 transitions. [2023-11-26 10:50:06,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2023-11-26 10:50:06,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:06,567 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:50:06,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:06,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:06,777 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:06,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:06,777 INFO L85 PathProgramCache]: Analyzing trace with hash -875075375, now seen corresponding path program 1 times [2023-11-26 10:50:06,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:06,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545963920] [2023-11-26 10:50:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:06,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:06,884 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:50:06,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205067539] [2023-11-26 10:50:06,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:06,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:06,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:06,886 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:06,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633ad20f-1f02-4b12-ab1e-3488d716e8d1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:50:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:07,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 10:50:07,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 3669 proven. 468 refuted. 0 times theorem prover too weak. 12243 trivial. 0 not checked. [2023-11-26 10:50:13,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:50:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 66 proven. 471 refuted. 0 times theorem prover too weak. 15843 trivial. 0 not checked. [2023-11-26 10:50:16,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:16,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545963920] [2023-11-26 10:50:16,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:50:16,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205067539] [2023-11-26 10:50:16,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205067539] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:50:16,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:50:16,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2023-11-26 10:50:16,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787557979] [2023-11-26 10:50:16,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:50:16,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 10:50:16,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:16,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 10:50:16,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2023-11-26 10:50:16,278 INFO L87 Difference]: Start difference. First operand 1755 states and 2918 transitions. Second operand has 22 states, 21 states have (on average 9.904761904761905) internal successors, (208), 20 states have internal predecessors, (208), 6 states have call successors, (182), 4 states have call predecessors, (182), 7 states have return successors, (182), 6 states have call predecessors, (182), 6 states have call successors, (182) [2023-11-26 10:50:23,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.49s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []