./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-47.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_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/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_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-47.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/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_a3f6b292-e61c-4410-a417-83d716613d40/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 a75b8f67c26fa022afc6872c6dfebc5b4eebf30a7bd3e0805fde26a693c626a2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:58:19,899 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:58:19,966 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:58:19,972 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:58:19,973 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:58:19,999 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:58:20,000 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:58:20,001 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:58:20,002 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:58:20,002 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:58:20,003 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:58:20,004 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:58:20,004 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:58:20,005 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:58:20,006 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:58:20,006 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:58:20,007 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:58:20,008 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:58:20,008 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:58:20,009 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:58:20,009 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:58:20,010 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:58:20,010 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:58:20,011 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:58:20,011 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:58:20,012 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:58:20,012 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:58:20,013 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:58:20,013 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:58:20,014 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:58:20,014 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:58:20,015 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:58:20,015 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:58:20,016 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:58:20,016 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:58:20,016 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:58:20,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:58:20,017 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:58:20,017 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:58:20,017 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:58:20,018 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:58:20,018 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:58:20,019 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_a3f6b292-e61c-4410-a417-83d716613d40/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a75b8f67c26fa022afc6872c6dfebc5b4eebf30a7bd3e0805fde26a693c626a2 [2023-11-26 11:58:20,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:58:20,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:58:20,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:58:20,363 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:58:20,364 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:58:20,365 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-47.i [2023-11-26 11:58:23,455 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:58:23,777 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:58:23,779 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-47.i [2023-11-26 11:58:23,794 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/data/4b49e5a72/f17a01bb97fd425388d02c0cb389a63a/FLAG4a2c030d1 [2023-11-26 11:58:23,813 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/data/4b49e5a72/f17a01bb97fd425388d02c0cb389a63a [2023-11-26 11:58:23,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:58:23,821 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:58:23,824 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:58:23,825 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:58:23,830 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:58:23,833 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:58:23" (1/1) ... [2023-11-26 11:58:23,834 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@166b277d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:23, skipping insertion in model container [2023-11-26 11:58:23,834 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:58:23" (1/1) ... [2023-11-26 11:58:23,884 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:58:24,088 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_a3f6b292-e61c-4410-a417-83d716613d40/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-47.i[919,932] [2023-11-26 11:58:24,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:58:24,198 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:58:24,211 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_a3f6b292-e61c-4410-a417-83d716613d40/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-47.i[919,932] [2023-11-26 11:58:24,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:58:24,313 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:58:24,314 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24 WrapperNode [2023-11-26 11:58:24,314 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:58:24,315 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:58:24,316 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:58:24,316 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:58:24,330 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,348 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,412 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 351 [2023-11-26 11:58:24,412 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:58:24,413 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:58:24,413 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:58:24,414 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:58:24,426 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,426 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,433 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,457 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:58:24,457 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,458 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,474 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,480 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,484 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,488 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,496 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:58:24,497 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:58:24,498 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:58:24,498 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:58:24,499 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:58:24,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:24,540 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:58:24,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:58:24,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:58:24,596 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:58:24,596 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:58:24,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:58:24,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:58:24,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:58:24,730 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:58:24,733 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:58:25,501 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:58:25,546 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:58:25,546 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:58:25,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:58:25 BoogieIcfgContainer [2023-11-26 11:58:25,547 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:58:25,550 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:58:25,550 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:58:25,554 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:58:25,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:58:23" (1/3) ... [2023-11-26 11:58:25,555 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581bd1d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:58:25, skipping insertion in model container [2023-11-26 11:58:25,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (2/3) ... [2023-11-26 11:58:25,556 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581bd1d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:58:25, skipping insertion in model container [2023-11-26 11:58:25,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:58:25" (3/3) ... [2023-11-26 11:58:25,557 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pe-cn_file-47.i [2023-11-26 11:58:25,575 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:58:25,576 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:58:25,632 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:58:25,638 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;@52bfd2ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:58:25,638 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:58:25,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 130 states, 85 states have (on average 1.5647058823529412) internal successors, (133), 86 states have internal predecessors, (133), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-26 11:58:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2023-11-26 11:58:25,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:25,672 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:25,672 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:25,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:25,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1248492979, now seen corresponding path program 1 times [2023-11-26 11:58:25,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:25,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241268248] [2023-11-26 11:58:25,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:25,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:26,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:26,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241268248] [2023-11-26 11:58:26,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:58:26,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962991727] [2023-11-26 11:58:26,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:26,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:26,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:26,021 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:26,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:58:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:26,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:58:26,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 3362 trivial. 0 not checked. [2023-11-26 11:58:26,451 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:58:26,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962991727] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:26,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:26,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:58:26,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469431324] [2023-11-26 11:58:26,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:26,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:58:26,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:26,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:58:26,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:58:26,525 INFO L87 Difference]: Start difference. First operand has 130 states, 85 states have (on average 1.5647058823529412) internal successors, (133), 86 states have internal predecessors, (133), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 2 states have call successors, (42) [2023-11-26 11:58:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:26,600 INFO L93 Difference]: Finished difference Result 257 states and 474 transitions. [2023-11-26 11:58:26,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:58:26,602 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 2 states have call successors, (42) Word has length 262 [2023-11-26 11:58:26,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:26,612 INFO L225 Difference]: With dead ends: 257 [2023-11-26 11:58:26,612 INFO L226 Difference]: Without dead ends: 128 [2023-11-26 11:58:26,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:58:26,621 INFO L413 NwaCegarLoop]: 205 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, 205 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:26,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 205 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:58:26,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-26 11:58:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-11-26 11:58:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 84 states have (on average 1.4761904761904763) internal successors, (124), 84 states have internal predecessors, (124), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-26 11:58:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 208 transitions. [2023-11-26 11:58:26,687 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 208 transitions. Word has length 262 [2023-11-26 11:58:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:26,688 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 208 transitions. [2023-11-26 11:58:26,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 2 states have call successors, (42) [2023-11-26 11:58:26,689 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 208 transitions. [2023-11-26 11:58:26,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2023-11-26 11:58:26,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:26,698 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:26,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:26,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:58:26,906 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:26,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:26,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1494833472, now seen corresponding path program 1 times [2023-11-26 11:58:26,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:26,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400441332] [2023-11-26 11:58:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:26,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:27,078 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:27,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122778914] [2023-11-26 11:58:27,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:27,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:27,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:27,098 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:27,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:58:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:27,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 11:58:27,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 357 proven. 117 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2023-11-26 11:58:28,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:58:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-11-26 11:58:29,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:29,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400441332] [2023-11-26 11:58:29,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:29,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122778914] [2023-11-26 11:58:29,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122778914] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:58:29,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:58:29,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2023-11-26 11:58:29,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209833677] [2023-11-26 11:58:29,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:58:29,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:58:29,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:29,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:58:29,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:58:29,272 INFO L87 Difference]: Start difference. First operand 128 states and 208 transitions. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 4 states have call successors, (84), 3 states have call predecessors, (84), 5 states have return successors, (84), 4 states have call predecessors, (84), 4 states have call successors, (84) [2023-11-26 11:58:30,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:30,736 INFO L93 Difference]: Finished difference Result 615 states and 998 transitions. [2023-11-26 11:58:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-26 11:58:30,737 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 4 states have call successors, (84), 3 states have call predecessors, (84), 5 states have return successors, (84), 4 states have call predecessors, (84), 4 states have call successors, (84) Word has length 263 [2023-11-26 11:58:30,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:30,746 INFO L225 Difference]: With dead ends: 615 [2023-11-26 11:58:30,747 INFO L226 Difference]: Without dead ends: 488 [2023-11-26 11:58:30,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2023-11-26 11:58:30,751 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 676 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:30,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 1349 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:58:30,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2023-11-26 11:58:30,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 314. [2023-11-26 11:58:30,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 223 states have (on average 1.5112107623318385) internal successors, (337), 224 states have internal predecessors, (337), 86 states have call successors, (86), 4 states have call predecessors, (86), 4 states have return successors, (86), 85 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-26 11:58:30,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 509 transitions. [2023-11-26 11:58:30,881 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 509 transitions. Word has length 263 [2023-11-26 11:58:30,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:30,885 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 509 transitions. [2023-11-26 11:58:30,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 4 states have call successors, (84), 3 states have call predecessors, (84), 5 states have return successors, (84), 4 states have call predecessors, (84), 4 states have call successors, (84) [2023-11-26 11:58:30,886 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 509 transitions. [2023-11-26 11:58:30,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-11-26 11:58:30,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:30,899 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:30,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-26 11:58:31,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-26 11:58:31,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:31,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:31,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1279834326, now seen corresponding path program 1 times [2023-11-26 11:58:31,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:31,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683692706] [2023-11-26 11:58:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:31,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:31,205 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:31,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660726719] [2023-11-26 11:58:31,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:31,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:31,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:31,210 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:31,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:58:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:31,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:58:31,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-26 11:58:31,473 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:58:31,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:31,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683692706] [2023-11-26 11:58:31,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:31,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660726719] [2023-11-26 11:58:31,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660726719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:31,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:31,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:58:31,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652957881] [2023-11-26 11:58:31,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:31,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:58:31,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:31,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:58:31,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:31,482 INFO L87 Difference]: Start difference. First operand 314 states and 509 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-26 11:58:31,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:31,577 INFO L93 Difference]: Finished difference Result 919 states and 1491 transitions. [2023-11-26 11:58:31,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:58:31,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 264 [2023-11-26 11:58:31,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:31,590 INFO L225 Difference]: With dead ends: 919 [2023-11-26 11:58:31,590 INFO L226 Difference]: Without dead ends: 606 [2023-11-26 11:58:31,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:31,596 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 191 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:31,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 467 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:58:31,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2023-11-26 11:58:31,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 326. [2023-11-26 11:58:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 235 states have (on average 1.4851063829787234) internal successors, (349), 236 states have internal predecessors, (349), 86 states have call successors, (86), 4 states have call predecessors, (86), 4 states have return successors, (86), 85 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-26 11:58:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 521 transitions. [2023-11-26 11:58:31,720 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 521 transitions. Word has length 264 [2023-11-26 11:58:31,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:31,722 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 521 transitions. [2023-11-26 11:58:31,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-26 11:58:31,722 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 521 transitions. [2023-11-26 11:58:31,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-11-26 11:58:31,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:31,728 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:31,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 11:58:31,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:31,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:31,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:31,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1209694636, now seen corresponding path program 1 times [2023-11-26 11:58:31,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:31,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804099145] [2023-11-26 11:58:31,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:31,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:32,023 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:32,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200290926] [2023-11-26 11:58:32,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:32,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:32,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:32,027 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:32,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:58:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:32,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:58:32,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1631 proven. 78 refuted. 0 times theorem prover too weak. 1735 trivial. 0 not checked. [2023-11-26 11:58:32,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:58:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 45 proven. 78 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-11-26 11:58:32,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:32,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804099145] [2023-11-26 11:58:32,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:32,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200290926] [2023-11-26 11:58:32,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200290926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:58:32,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:58:32,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-26 11:58:32,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400373500] [2023-11-26 11:58:32,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:58:32,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:58:32,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:32,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:58:32,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:58:32,871 INFO L87 Difference]: Start difference. First operand 326 states and 521 transitions. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 2 states have call successors, (68), 2 states have call predecessors, (68), 4 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-26 11:58:33,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:33,973 INFO L93 Difference]: Finished difference Result 1312 states and 2070 transitions. [2023-11-26 11:58:33,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-26 11:58:33,974 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 2 states have call successors, (68), 2 states have call predecessors, (68), 4 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 264 [2023-11-26 11:58:33,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:33,984 INFO L225 Difference]: With dead ends: 1312 [2023-11-26 11:58:33,984 INFO L226 Difference]: Without dead ends: 987 [2023-11-26 11:58:33,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 520 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2023-11-26 11:58:33,993 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 382 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:33,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 1343 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:58:33,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2023-11-26 11:58:34,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 502. [2023-11-26 11:58:34,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 348 states have (on average 1.4310344827586208) internal successors, (498), 351 states have internal predecessors, (498), 143 states have call successors, (143), 10 states have call predecessors, (143), 10 states have return successors, (143), 140 states have call predecessors, (143), 143 states have call successors, (143) [2023-11-26 11:58:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 784 transitions. [2023-11-26 11:58:34,143 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 784 transitions. Word has length 264 [2023-11-26 11:58:34,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:34,144 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 784 transitions. [2023-11-26 11:58:34,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 2 states have call successors, (68), 2 states have call predecessors, (68), 4 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-26 11:58:34,145 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 784 transitions. [2023-11-26 11:58:34,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-11-26 11:58:34,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:34,150 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:34,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:34,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:34,358 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:34,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:34,359 INFO L85 PathProgramCache]: Analyzing trace with hash 700221546, now seen corresponding path program 1 times [2023-11-26 11:58:34,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:34,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567227591] [2023-11-26 11:58:34,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:34,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:34,413 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:34,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732995896] [2023-11-26 11:58:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:34,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:34,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:34,416 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:34,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:58:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:34,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:58:34,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-26 11:58:34,670 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:58:34,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:34,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567227591] [2023-11-26 11:58:34,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:34,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732995896] [2023-11-26 11:58:34,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732995896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:34,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:34,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:58:34,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274495191] [2023-11-26 11:58:34,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:34,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:58:34,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:34,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:58:34,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:34,681 INFO L87 Difference]: Start difference. First operand 502 states and 784 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-26 11:58:34,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:34,866 INFO L93 Difference]: Finished difference Result 1312 states and 2054 transitions. [2023-11-26 11:58:34,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:58:34,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 264 [2023-11-26 11:58:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:34,876 INFO L225 Difference]: With dead ends: 1312 [2023-11-26 11:58:34,876 INFO L226 Difference]: Without dead ends: 839 [2023-11-26 11:58:34,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:34,880 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 190 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:34,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 512 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:58:34,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2023-11-26 11:58:35,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 629. [2023-11-26 11:58:35,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 475 states have (on average 1.4652631578947368) internal successors, (696), 478 states have internal predecessors, (696), 143 states have call successors, (143), 10 states have call predecessors, (143), 10 states have return successors, (143), 140 states have call predecessors, (143), 143 states have call successors, (143) [2023-11-26 11:58:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 982 transitions. [2023-11-26 11:58:35,035 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 982 transitions. Word has length 264 [2023-11-26 11:58:35,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:35,039 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 982 transitions. [2023-11-26 11:58:35,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-26 11:58:35,040 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 982 transitions. [2023-11-26 11:58:35,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-11-26 11:58:35,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:35,047 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:35,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:35,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:35,255 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:35,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:35,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1994456262, now seen corresponding path program 1 times [2023-11-26 11:58:35,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:35,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544539387] [2023-11-26 11:58:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:35,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:35,317 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:35,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720963780] [2023-11-26 11:58:35,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:35,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:35,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:35,319 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:35,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:58:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:35,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:58:35,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-26 11:58:36,532 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:58:36,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:36,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544539387] [2023-11-26 11:58:36,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:36,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720963780] [2023-11-26 11:58:36,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720963780] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:36,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:36,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:58:36,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764085200] [2023-11-26 11:58:36,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:36,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:58:36,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:36,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:58:36,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:58:36,537 INFO L87 Difference]: Start difference. First operand 629 states and 982 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-26 11:58:36,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:36,856 INFO L93 Difference]: Finished difference Result 1388 states and 2170 transitions. [2023-11-26 11:58:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:58:36,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 265 [2023-11-26 11:58:36,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:36,864 INFO L225 Difference]: With dead ends: 1388 [2023-11-26 11:58:36,865 INFO L226 Difference]: Without dead ends: 788 [2023-11-26 11:58:36,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:58:36,868 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 125 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:36,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 585 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:58:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2023-11-26 11:58:36,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 556. [2023-11-26 11:58:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 418 states have (on average 1.4545454545454546) internal successors, (608), 419 states have internal predecessors, (608), 128 states have call successors, (128), 9 states have call predecessors, (128), 9 states have return successors, (128), 127 states have call predecessors, (128), 128 states have call successors, (128) [2023-11-26 11:58:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 864 transitions. [2023-11-26 11:58:36,974 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 864 transitions. Word has length 265 [2023-11-26 11:58:36,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:36,975 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 864 transitions. [2023-11-26 11:58:36,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2023-11-26 11:58:36,975 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 864 transitions. [2023-11-26 11:58:36,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-11-26 11:58:36,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:36,981 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:36,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-26 11:58:37,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:58:37,190 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:37,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:37,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1199866663, now seen corresponding path program 1 times [2023-11-26 11:58:37,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:37,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37209391] [2023-11-26 11:58:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:37,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:37,238 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:37,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131287702] [2023-11-26 11:58:37,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:37,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:37,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:37,240 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:37,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:58:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:37,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 11:58:37,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1865 proven. 237 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2023-11-26 11:58:39,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:58:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 114 proven. 246 refuted. 0 times theorem prover too weak. 3084 trivial. 0 not checked. [2023-11-26 11:58:43,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:43,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37209391] [2023-11-26 11:58:43,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:43,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131287702] [2023-11-26 11:58:43,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131287702] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:58:43,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:58:43,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2023-11-26 11:58:43,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196695828] [2023-11-26 11:58:43,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:58:43,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 11:58:43,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:43,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 11:58:43,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:58:43,019 INFO L87 Difference]: Start difference. First operand 556 states and 864 transitions. Second operand has 24 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 8 states have call successors, (84), 5 states have call predecessors, (84), 10 states have return successors, (84), 8 states have call predecessors, (84), 8 states have call successors, (84) [2023-11-26 11:59:03,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:03,919 INFO L93 Difference]: Finished difference Result 1659 states and 2482 transitions. [2023-11-26 11:59:03,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-11-26 11:59:03,920 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 8 states have call successors, (84), 5 states have call predecessors, (84), 10 states have return successors, (84), 8 states have call predecessors, (84), 8 states have call successors, (84) Word has length 266 [2023-11-26 11:59:03,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:03,929 INFO L225 Difference]: With dead ends: 1659 [2023-11-26 11:59:03,929 INFO L226 Difference]: Without dead ends: 1184 [2023-11-26 11:59:03,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5007 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=3129, Invalid=9303, Unknown=0, NotChecked=0, Total=12432 [2023-11-26 11:59:03,937 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 1601 mSDsluCounter, 2273 mSDsCounter, 0 mSdLazyCounter, 2619 mSolverCounterSat, 1076 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1605 SdHoareTripleChecker+Valid, 2606 SdHoareTripleChecker+Invalid, 3695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1076 IncrementalHoareTripleChecker+Valid, 2619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:03,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1605 Valid, 2606 Invalid, 3695 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1076 Valid, 2619 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-11-26 11:59:03,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2023-11-26 11:59:04,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 664. [2023-11-26 11:59:04,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 472 states have (on average 1.3771186440677967) internal successors, (650), 474 states have internal predecessors, (650), 170 states have call successors, (170), 21 states have call predecessors, (170), 21 states have return successors, (170), 168 states have call predecessors, (170), 170 states have call successors, (170) [2023-11-26 11:59:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 990 transitions. [2023-11-26 11:59:04,110 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 990 transitions. Word has length 266 [2023-11-26 11:59:04,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:04,111 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 990 transitions. [2023-11-26 11:59:04,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 8 states have call successors, (84), 5 states have call predecessors, (84), 10 states have return successors, (84), 8 states have call predecessors, (84), 8 states have call successors, (84) [2023-11-26 11:59:04,111 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 990 transitions. [2023-11-26 11:59:04,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-26 11:59:04,116 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:04,116 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:04,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:04,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:59:04,324 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:04,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:04,325 INFO L85 PathProgramCache]: Analyzing trace with hash 303585705, now seen corresponding path program 1 times [2023-11-26 11:59:04,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:04,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850162201] [2023-11-26 11:59:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:04,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:04,385 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:04,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763222656] [2023-11-26 11:59:04,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:04,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:04,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:04,387 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:04,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f6b292-e61c-4410-a417-83d716613d40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:59:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:04,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:59:04,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 357 proven. 117 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2023-11-26 11:59:05,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-11-26 11:59:16,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:16,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850162201] [2023-11-26 11:59:16,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:16,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763222656] [2023-11-26 11:59:16,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763222656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:16,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:59:16,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2023-11-26 11:59:16,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950387570] [2023-11-26 11:59:16,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:16,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:59:16,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:16,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:59:16,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:59:16,999 INFO L87 Difference]: Start difference. First operand 664 states and 990 transitions. Second operand has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 4 states have call successors, (84), 3 states have call predecessors, (84), 5 states have return successors, (84), 4 states have call predecessors, (84), 4 states have call successors, (84)