./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-26.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/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_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-26.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/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_61909d2a-a12e-46d2-9e11-7c8270e19fd6/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 0cc8a0783ec7e65aec5bb1b8ce7f7837d17a7d27f4f67ff4962ce15c1b498ac3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:43:43,670 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:43:43,786 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:43:43,794 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:43:43,795 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:43:43,840 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:43:43,841 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:43:43,841 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:43:43,843 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:43:43,848 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:43:43,849 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:43:43,850 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:43:43,851 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:43:43,853 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:43:43,853 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:43:43,854 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:43:43,854 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:43:43,855 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:43:43,855 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:43:43,856 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:43:43,856 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:43:43,857 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:43:43,857 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:43:43,858 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:43:43,858 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:43:43,859 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:43:43,859 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:43:43,860 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:43:43,861 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:43:43,861 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:43:43,863 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:43:43,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:43:43,863 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:43:43,863 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:43:43,864 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:43:43,864 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:43:43,864 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:43:43,865 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:43:43,865 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:43:43,865 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:43:43,865 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:43:43,866 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:43:43,866 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_61909d2a-a12e-46d2-9e11-7c8270e19fd6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0cc8a0783ec7e65aec5bb1b8ce7f7837d17a7d27f4f67ff4962ce15c1b498ac3 [2023-11-26 10:43:44,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:43:44,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:43:44,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:43:44,202 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:43:44,203 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:43:44,204 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-26.i [2023-11-26 10:43:47,321 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:43:47,573 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:43:47,574 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-26.i [2023-11-26 10:43:47,599 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/data/6d54e2fa0/faf6a17d15e54a18ad602ccacea3fb62/FLAG4ad23a12f [2023-11-26 10:43:47,616 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/data/6d54e2fa0/faf6a17d15e54a18ad602ccacea3fb62 [2023-11-26 10:43:47,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:43:47,621 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:43:47,622 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:43:47,623 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:43:47,633 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:43:47,634 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:43:47" (1/1) ... [2023-11-26 10:43:47,637 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b494453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:47, skipping insertion in model container [2023-11-26 10:43:47,638 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:43:47" (1/1) ... [2023-11-26 10:43:47,698 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:43:47,913 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_61909d2a-a12e-46d2-9e11-7c8270e19fd6/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-26.i[916,929] [2023-11-26 10:43:48,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:43:48,087 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:43:48,101 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_61909d2a-a12e-46d2-9e11-7c8270e19fd6/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-26.i[916,929] [2023-11-26 10:43:48,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:43:48,166 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:43:48,166 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:48 WrapperNode [2023-11-26 10:43:48,167 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:43:48,168 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:43:48,168 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:43:48,169 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:43:48,177 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:48" (1/1) ... [2023-11-26 10:43:48,193 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:48" (1/1) ... [2023-11-26 10:43:48,258 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 229 [2023-11-26 10:43:48,258 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:43:48,259 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:43:48,259 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:43:48,260 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:43:48,272 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:48" (1/1) ... [2023-11-26 10:43:48,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:48" (1/1) ... [2023-11-26 10:43:48,278 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:48" (1/1) ... [2023-11-26 10:43:48,314 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 10:43:48,328 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:48" (1/1) ... [2023-11-26 10:43:48,328 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:48" (1/1) ... [2023-11-26 10:43:48,348 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:48" (1/1) ... [2023-11-26 10:43:48,369 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:48" (1/1) ... [2023-11-26 10:43:48,373 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:48" (1/1) ... [2023-11-26 10:43:48,377 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:48" (1/1) ... [2023-11-26 10:43:48,388 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:43:48,389 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:43:48,389 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:43:48,389 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:43:48,390 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:48" (1/1) ... [2023-11-26 10:43:48,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:43:48,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:48,434 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:43:48,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:43:48,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:43:48,484 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:43:48,486 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:43:48,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:43:48,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:43:48,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:43:48,638 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:43:48,641 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:43:49,387 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:43:49,431 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:43:49,432 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:43:49,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:43:49 BoogieIcfgContainer [2023-11-26 10:43:49,433 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:43:49,436 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:43:49,436 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:43:49,440 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:43:49,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:43:47" (1/3) ... [2023-11-26 10:43:49,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4674e306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:43:49, skipping insertion in model container [2023-11-26 10:43:49,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:48" (2/3) ... [2023-11-26 10:43:49,442 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4674e306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:43:49, skipping insertion in model container [2023-11-26 10:43:49,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:43:49" (3/3) ... [2023-11-26 10:43:49,444 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_100-while_file-26.i [2023-11-26 10:43:49,466 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:43:49,467 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:43:49,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:43:49,537 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;@3ea7a4f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:43:49,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:43:49,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 62 states have internal predecessors, (91), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-26 10:43:49,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-11-26 10:43:49,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:49,566 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:43:49,566 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:43:49,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:49,572 INFO L85 PathProgramCache]: Analyzing trace with hash 228631936, now seen corresponding path program 1 times [2023-11-26 10:43:49,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:49,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754556475] [2023-11-26 10:43:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:49,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:49,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:49,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754556475] [2023-11-26 10:43:49,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:43:49,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900667694] [2023-11-26 10:43:49,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:49,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:49,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:49,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:49,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:43:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:50,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 10:43:50,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2023-11-26 10:43:50,260 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:43:50,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900667694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:50,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:50,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:43:50,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397490225] [2023-11-26 10:43:50,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:50,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:43:50,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:50,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:43:50,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:43:50,324 INFO L87 Difference]: Start difference. First operand has 94 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 62 states have internal predecessors, (91), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 2 states have call successors, (30) [2023-11-26 10:43:50,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:50,407 INFO L93 Difference]: Finished difference Result 185 states and 330 transitions. [2023-11-26 10:43:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:43:50,410 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 2 states have call successors, (30) Word has length 193 [2023-11-26 10:43:50,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:50,423 INFO L225 Difference]: With dead ends: 185 [2023-11-26 10:43:50,424 INFO L226 Difference]: Without dead ends: 92 [2023-11-26 10:43:50,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 192 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 10:43:50,437 INFO L413 NwaCegarLoop]: 143 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, 143 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 10:43:50,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 143 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:43:50,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-26 10:43:50,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-11-26 10:43:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 60 states have internal predecessors, (86), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-26 10:43:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 146 transitions. [2023-11-26 10:43:50,498 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 146 transitions. Word has length 193 [2023-11-26 10:43:50,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:50,498 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 146 transitions. [2023-11-26 10:43:50,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 2 states have call successors, (30) [2023-11-26 10:43:50,499 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 146 transitions. [2023-11-26 10:43:50,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-11-26 10:43:50,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:50,505 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:43:50,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:50,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 10:43:50,719 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:43:50,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:50,720 INFO L85 PathProgramCache]: Analyzing trace with hash -728940540, now seen corresponding path program 1 times [2023-11-26 10:43:50,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:50,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115542337] [2023-11-26 10:43:50,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:50,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:50,841 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:43:50,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001981642] [2023-11-26 10:43:50,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:50,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:50,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:50,846 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:50,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:43:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:51,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:43:51,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-11-26 10:43:51,193 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:43:51,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:51,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115542337] [2023-11-26 10:43:51,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:43:51,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001981642] [2023-11-26 10:43:51,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001981642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:51,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:51,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:43:51,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670120412] [2023-11-26 10:43:51,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:51,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:43:51,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:51,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:43:51,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:43:51,198 INFO L87 Difference]: Start difference. First operand 92 states and 146 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-26 10:43:51,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:51,490 INFO L93 Difference]: Finished difference Result 269 states and 427 transitions. [2023-11-26 10:43:51,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:43:51,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) Word has length 193 [2023-11-26 10:43:51,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:51,502 INFO L225 Difference]: With dead ends: 269 [2023-11-26 10:43:51,502 INFO L226 Difference]: Without dead ends: 178 [2023-11-26 10:43:51,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 190 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 10:43:51,507 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 126 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:51,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 325 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:43:51,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-26 10:43:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 110. [2023-11-26 10:43:51,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 78 states have (on average 1.4743589743589745) internal successors, (115), 78 states have internal predecessors, (115), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-26 10:43:51,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 175 transitions. [2023-11-26 10:43:51,548 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 175 transitions. Word has length 193 [2023-11-26 10:43:51,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:51,550 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 175 transitions. [2023-11-26 10:43:51,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-26 10:43:51,550 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 175 transitions. [2023-11-26 10:43:51,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-26 10:43:51,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:51,564 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:43:51,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:51,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:51,777 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:43:51,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:51,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1712222014, now seen corresponding path program 1 times [2023-11-26 10:43:51,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:51,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273349263] [2023-11-26 10:43:51,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:51,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:51,861 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:43:51,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263721356] [2023-11-26 10:43:51,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:51,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:51,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:51,866 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:51,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:43:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:52,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:43:52,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 29 proven. 87 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-26 10:43:52,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:52,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2023-11-26 10:43:52,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:52,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273349263] [2023-11-26 10:43:52,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:43:52,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263721356] [2023-11-26 10:43:52,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263721356] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:52,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:43:52,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-26 10:43:52,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966047970] [2023-11-26 10:43:52,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:52,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:43:52,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:52,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:43:52,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:43:52,825 INFO L87 Difference]: Start difference. First operand 110 states and 175 transitions. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 3 states have call successors, (59), 2 states have call predecessors, (59), 4 states have return successors, (60), 2 states have call predecessors, (60), 3 states have call successors, (60) [2023-11-26 10:43:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:53,305 INFO L93 Difference]: Finished difference Result 281 states and 437 transitions. [2023-11-26 10:43:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:43:53,306 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 3 states have call successors, (59), 2 states have call predecessors, (59), 4 states have return successors, (60), 2 states have call predecessors, (60), 3 states have call successors, (60) Word has length 194 [2023-11-26 10:43:53,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:53,309 INFO L225 Difference]: With dead ends: 281 [2023-11-26 10:43:53,309 INFO L226 Difference]: Without dead ends: 172 [2023-11-26 10:43:53,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-26 10:43:53,312 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 155 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:53,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 413 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:43:53,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-26 10:43:53,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 167. [2023-11-26 10:43:53,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 128 states have (on average 1.4453125) internal successors, (185), 129 states have internal predecessors, (185), 34 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-26 10:43:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 253 transitions. [2023-11-26 10:43:53,334 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 253 transitions. Word has length 194 [2023-11-26 10:43:53,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:53,336 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 253 transitions. [2023-11-26 10:43:53,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 3 states have call successors, (59), 2 states have call predecessors, (59), 4 states have return successors, (60), 2 states have call predecessors, (60), 3 states have call successors, (60) [2023-11-26 10:43:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 253 transitions. [2023-11-26 10:43:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-26 10:43:53,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:53,340 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:43:53,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:53,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:53,552 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:43:53,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:53,553 INFO L85 PathProgramCache]: Analyzing trace with hash 994397380, now seen corresponding path program 1 times [2023-11-26 10:43:53,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:53,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724001439] [2023-11-26 10:43:53,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:53,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:53,601 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:43:53,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393307425] [2023-11-26 10:43:53,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:53,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:53,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:53,603 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:53,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:43:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:53,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:43:53,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 857 proven. 33 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2023-11-26 10:43:54,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 54 proven. 33 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2023-11-26 10:43:54,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:54,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724001439] [2023-11-26 10:43:54,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:43:54,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393307425] [2023-11-26 10:43:54,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393307425] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:54,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:43:54,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-26 10:43:54,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692382397] [2023-11-26 10:43:54,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:54,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:43:54,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:54,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:43:54,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:43:54,295 INFO L87 Difference]: Start difference. First operand 167 states and 253 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 3 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-11-26 10:43:55,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:55,786 INFO L93 Difference]: Finished difference Result 749 states and 1130 transitions. [2023-11-26 10:43:55,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-26 10:43:55,787 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 3 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 194 [2023-11-26 10:43:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:55,794 INFO L225 Difference]: With dead ends: 749 [2023-11-26 10:43:55,794 INFO L226 Difference]: Without dead ends: 583 [2023-11-26 10:43:55,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2023-11-26 10:43:55,797 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 611 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:55,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 777 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 10:43:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2023-11-26 10:43:55,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 339. [2023-11-26 10:43:55,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 260 states have (on average 1.4307692307692308) internal successors, (372), 262 states have internal predecessors, (372), 68 states have call successors, (68), 10 states have call predecessors, (68), 10 states have return successors, (68), 66 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-26 10:43:55,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 508 transitions. [2023-11-26 10:43:55,857 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 508 transitions. Word has length 194 [2023-11-26 10:43:55,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:55,858 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 508 transitions. [2023-11-26 10:43:55,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 3 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-11-26 10:43:55,858 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 508 transitions. [2023-11-26 10:43:55,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-26 10:43:55,862 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:55,862 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:43:55,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:56,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:56,069 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:43:56,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:56,070 INFO L85 PathProgramCache]: Analyzing trace with hash -694546362, now seen corresponding path program 1 times [2023-11-26 10:43:56,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:56,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868295354] [2023-11-26 10:43:56,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:56,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:56,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:43:56,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222703386] [2023-11-26 10:43:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:56,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:56,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:56,116 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:56,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:43:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:56,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 10:43:56,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 1034 proven. 84 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2023-11-26 10:43:56,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 84 proven. 87 refuted. 0 times theorem prover too weak. 1569 trivial. 0 not checked. [2023-11-26 10:43:57,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:57,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868295354] [2023-11-26 10:43:57,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:43:57,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222703386] [2023-11-26 10:43:57,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222703386] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:57,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:43:57,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2023-11-26 10:43:57,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614751018] [2023-11-26 10:43:57,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:57,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 10:43:57,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:57,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 10:43:57,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:43:57,198 INFO L87 Difference]: Start difference. First operand 339 states and 508 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 3 states have call successors, (53), 3 states have call predecessors, (53), 7 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2023-11-26 10:43:58,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:58,839 INFO L93 Difference]: Finished difference Result 1000 states and 1452 transitions. [2023-11-26 10:43:58,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-26 10:43:58,839 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 3 states have call successors, (53), 3 states have call predecessors, (53), 7 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) Word has length 194 [2023-11-26 10:43:58,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:58,845 INFO L225 Difference]: With dead ends: 1000 [2023-11-26 10:43:58,845 INFO L226 Difference]: Without dead ends: 662 [2023-11-26 10:43:58,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 374 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=584, Invalid=1768, Unknown=0, NotChecked=0, Total=2352 [2023-11-26 10:43:58,849 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 397 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:58,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 749 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 10:43:58,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2023-11-26 10:43:58,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 287. [2023-11-26 10:43:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 204 states have (on average 1.3088235294117647) internal successors, (267), 206 states have internal predecessors, (267), 68 states have call successors, (68), 14 states have call predecessors, (68), 14 states have return successors, (68), 66 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-26 10:43:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 403 transitions. [2023-11-26 10:43:58,906 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 403 transitions. Word has length 194 [2023-11-26 10:43:58,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:58,907 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 403 transitions. [2023-11-26 10:43:58,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 3 states have call successors, (53), 3 states have call predecessors, (53), 7 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2023-11-26 10:43:58,907 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 403 transitions. [2023-11-26 10:43:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-26 10:43:58,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:58,910 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:43:58,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:59,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:59,118 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:43:59,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:59,119 INFO L85 PathProgramCache]: Analyzing trace with hash 28931626, now seen corresponding path program 1 times [2023-11-26 10:43:59,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:59,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387983206] [2023-11-26 10:43:59,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:59,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:59,151 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:43:59,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482999183] [2023-11-26 10:43:59,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:59,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:59,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:59,153 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:59,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:43:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:59,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:43:59,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-11-26 10:43:59,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:43:59,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:59,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387983206] [2023-11-26 10:43:59,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:43:59,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482999183] [2023-11-26 10:43:59,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482999183] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:59,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:59,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:43:59,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750033087] [2023-11-26 10:43:59,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:59,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:43:59,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:59,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:43:59,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:43:59,635 INFO L87 Difference]: Start difference. First operand 287 states and 403 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-26 10:43:59,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:59,868 INFO L93 Difference]: Finished difference Result 757 states and 1063 transitions. [2023-11-26 10:43:59,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:43:59,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) Word has length 195 [2023-11-26 10:43:59,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:59,873 INFO L225 Difference]: With dead ends: 757 [2023-11-26 10:43:59,873 INFO L226 Difference]: Without dead ends: 471 [2023-11-26 10:43:59,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:43:59,875 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 129 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:59,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 512 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:43:59,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-11-26 10:43:59,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 429. [2023-11-26 10:43:59,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 305 states have (on average 1.3049180327868852) internal successors, (398), 308 states have internal predecessors, (398), 102 states have call successors, (102), 21 states have call predecessors, (102), 21 states have return successors, (102), 99 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-26 10:43:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 602 transitions. [2023-11-26 10:43:59,950 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 602 transitions. Word has length 195 [2023-11-26 10:43:59,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:59,951 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 602 transitions. [2023-11-26 10:43:59,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-26 10:43:59,951 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 602 transitions. [2023-11-26 10:43:59,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-26 10:43:59,954 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:59,954 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:43:59,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-26 10:44:00,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:00,161 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:00,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:00,162 INFO L85 PathProgramCache]: Analyzing trace with hash 169480236, now seen corresponding path program 1 times [2023-11-26 10:44:00,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:00,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998406667] [2023-11-26 10:44:00,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:00,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:00,207 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:00,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392177834] [2023-11-26 10:44:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:00,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:00,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:00,209 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:00,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:44:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:00,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 10:44:00,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 950 proven. 36 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2023-11-26 10:44:01,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 132 proven. 39 refuted. 0 times theorem prover too weak. 1569 trivial. 0 not checked. [2023-11-26 10:44:01,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:01,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998406667] [2023-11-26 10:44:01,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:01,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392177834] [2023-11-26 10:44:01,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392177834] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:01,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:44:01,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2023-11-26 10:44:01,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140590880] [2023-11-26 10:44:01,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:01,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 10:44:01,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:01,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 10:44:01,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-11-26 10:44:01,594 INFO L87 Difference]: Start difference. First operand 429 states and 602 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 6 states have call successors, (60), 4 states have call predecessors, (60), 8 states have return successors, (60), 6 states have call predecessors, (60), 6 states have call successors, (60) [2023-11-26 10:44:04,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:04,534 INFO L93 Difference]: Finished difference Result 1875 states and 2626 transitions. [2023-11-26 10:44:04,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-26 10:44:04,535 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 6 states have call successors, (60), 4 states have call predecessors, (60), 8 states have return successors, (60), 6 states have call predecessors, (60), 6 states have call successors, (60) Word has length 195 [2023-11-26 10:44:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:04,545 INFO L225 Difference]: With dead ends: 1875 [2023-11-26 10:44:04,546 INFO L226 Difference]: Without dead ends: 1447 [2023-11-26 10:44:04,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=578, Invalid=1492, Unknown=0, NotChecked=0, Total=2070 [2023-11-26 10:44:04,549 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 625 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:04,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 1287 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1679 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-26 10:44:04,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2023-11-26 10:44:04,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 587. [2023-11-26 10:44:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 418 states have (on average 1.291866028708134) internal successors, (540), 422 states have internal predecessors, (540), 136 states have call successors, (136), 32 states have call predecessors, (136), 32 states have return successors, (136), 132 states have call predecessors, (136), 136 states have call successors, (136) [2023-11-26 10:44:04,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 812 transitions. [2023-11-26 10:44:04,696 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 812 transitions. Word has length 195 [2023-11-26 10:44:04,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:04,696 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 812 transitions. [2023-11-26 10:44:04,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 6 states have call successors, (60), 4 states have call predecessors, (60), 8 states have return successors, (60), 6 states have call predecessors, (60), 6 states have call successors, (60) [2023-11-26 10:44:04,697 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 812 transitions. [2023-11-26 10:44:04,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-26 10:44:04,700 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:04,700 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:44:04,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:04,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:04,908 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:04,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:04,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1635958098, now seen corresponding path program 1 times [2023-11-26 10:44:04,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:04,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191904579] [2023-11-26 10:44:04,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:04,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:04,945 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:04,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293377557] [2023-11-26 10:44:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:04,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:04,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:04,947 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:04,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61909d2a-a12e-46d2-9e11-7c8270e19fd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:44:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:05,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-26 10:44:05,151 INFO L285 TraceCheckSpWp]: Computing forward predicates...