./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-36.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-36.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ --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 c7e974c6e5fec01354043338f8cc30b791da3683a39f1bcafe943125c6faad54 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:36:57,545 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:36:57,659 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:36:57,668 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:36:57,668 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:36:57,713 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:36:57,715 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:36:57,716 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:36:57,717 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:36:57,722 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:36:57,723 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:36:57,724 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:36:57,725 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:36:57,727 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:36:57,728 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:36:57,728 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:36:57,729 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:36:57,729 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:36:57,730 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:36:57,730 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:36:57,731 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:36:57,732 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:36:57,732 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:36:57,733 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:36:57,733 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:36:57,734 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:36:57,734 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:36:57,735 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:36:57,736 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:36:57,736 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:36:57,738 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:36:57,738 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:36:57,739 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:36:57,739 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:36:57,739 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:36:57,740 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:36:57,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:36:57,740 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:36:57,741 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:36:57,741 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:36:57,741 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:36:57,742 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:36:57,743 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_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e974c6e5fec01354043338f8cc30b791da3683a39f1bcafe943125c6faad54 [2023-11-23 22:36:58,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:36:58,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:36:58,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:36:58,142 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:36:58,142 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:36:58,144 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-36.i [2023-11-23 22:37:01,321 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:37:01,655 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:37:01,655 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-36.i [2023-11-23 22:37:01,669 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/data/2f2f4319f/3ffbd8784195421b988b4736d43156da/FLAGb2516c00e [2023-11-23 22:37:01,684 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/data/2f2f4319f/3ffbd8784195421b988b4736d43156da [2023-11-23 22:37:01,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:37:01,688 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:37:01,690 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:37:01,690 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:37:01,696 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:37:01,697 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:37:01" (1/1) ... [2023-11-23 22:37:01,698 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d89146b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:01, skipping insertion in model container [2023-11-23 22:37:01,698 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:37:01" (1/1) ... [2023-11-23 22:37:01,772 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:37:01,931 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_abaeed3d-a653-454a-8b1f-6cda45bfc02a/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-36.i[916,929] [2023-11-23 22:37:02,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:37:02,188 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:37:02,201 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_abaeed3d-a653-454a-8b1f-6cda45bfc02a/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-36.i[916,929] [2023-11-23 22:37:02,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:37:02,324 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:37:02,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:02 WrapperNode [2023-11-23 22:37:02,345 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:37:02,346 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:37:02,347 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:37:02,347 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:37:02,355 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:02" (1/1) ... [2023-11-23 22:37:02,384 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:02" (1/1) ... [2023-11-23 22:37:02,480 INFO L138 Inliner]: procedures = 26, calls = 69, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 484 [2023-11-23 22:37:02,480 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:37:02,481 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:37:02,481 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:37:02,481 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:37:02,494 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:02" (1/1) ... [2023-11-23 22:37:02,494 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:02" (1/1) ... [2023-11-23 22:37:02,518 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:02" (1/1) ... [2023-11-23 22:37:02,565 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 22:37:02,565 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:02" (1/1) ... [2023-11-23 22:37:02,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:02" (1/1) ... [2023-11-23 22:37:02,613 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:02" (1/1) ... [2023-11-23 22:37:02,625 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:02" (1/1) ... [2023-11-23 22:37:02,631 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:02" (1/1) ... [2023-11-23 22:37:02,638 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:02" (1/1) ... [2023-11-23 22:37:02,651 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:37:02,652 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:37:02,652 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:37:02,652 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:37:02,653 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:02" (1/1) ... [2023-11-23 22:37:02,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:37:02,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:02,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:37:02,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:37:02,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:37:02,734 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 22:37:02,735 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 22:37:02,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:37:02,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:37:02,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:37:02,894 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:37:02,896 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:37:03,999 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:37:04,077 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:37:04,078 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 22:37:04,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:37:04 BoogieIcfgContainer [2023-11-23 22:37:04,079 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:37:04,083 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:37:04,083 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:37:04,086 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:37:04,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:37:01" (1/3) ... [2023-11-23 22:37:04,088 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b3e09ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:37:04, skipping insertion in model container [2023-11-23 22:37:04,088 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:02" (2/3) ... [2023-11-23 22:37:04,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b3e09ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:37:04, skipping insertion in model container [2023-11-23 22:37:04,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:37:04" (3/3) ... [2023-11-23 22:37:04,092 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-36.i [2023-11-23 22:37:04,114 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:37:04,114 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:37:04,188 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:37:04,197 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;@7bf2f012, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:37:04,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 22:37:04,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 191 states, 132 states have (on average 1.5227272727272727) internal successors, (201), 133 states have internal predecessors, (201), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-23 22:37:04,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2023-11-23 22:37:04,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:04,253 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:04,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:04,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:04,260 INFO L85 PathProgramCache]: Analyzing trace with hash 512382050, now seen corresponding path program 1 times [2023-11-23 22:37:04,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:04,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075915834] [2023-11-23 22:37:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:04,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:04,601 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:37:04,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326308571] [2023-11-23 22:37:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:04,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:04,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:04,609 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:04,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:37:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:04,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 22:37:04,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-23 22:37:05,249 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:37:05,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:05,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075915834] [2023-11-23 22:37:05,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:37:05,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326308571] [2023-11-23 22:37:05,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326308571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:05,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:05,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:37:05,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666619941] [2023-11-23 22:37:05,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:05,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:37:05,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:05,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:37:05,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:37:05,314 INFO L87 Difference]: Start difference. First operand has 191 states, 132 states have (on average 1.5227272727272727) internal successors, (201), 133 states have internal predecessors, (201), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:05,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:05,468 INFO L93 Difference]: Finished difference Result 564 states and 1041 transitions. [2023-11-23 22:37:05,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:37:05,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 366 [2023-11-23 22:37:05,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:05,488 INFO L225 Difference]: With dead ends: 564 [2023-11-23 22:37:05,489 INFO L226 Difference]: Without dead ends: 374 [2023-11-23 22:37:05,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:37:05,499 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 273 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:05,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 765 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:37:05,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-23 22:37:05,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 222. [2023-11-23 22:37:05,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 164 states have (on average 1.5365853658536586) internal successors, (252), 164 states have internal predecessors, (252), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-23 22:37:05,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 364 transitions. [2023-11-23 22:37:05,590 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 364 transitions. Word has length 366 [2023-11-23 22:37:05,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:05,594 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 364 transitions. [2023-11-23 22:37:05,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:05,595 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 364 transitions. [2023-11-23 22:37:05,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2023-11-23 22:37:05,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:05,605 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:05,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 22:37:05,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 22:37:05,829 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:05,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:05,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1481762656, now seen corresponding path program 1 times [2023-11-23 22:37:05,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:05,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69122738] [2023-11-23 22:37:05,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:05,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:05,974 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:37:05,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034455578] [2023-11-23 22:37:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:05,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:05,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:05,979 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:06,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:37:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:06,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 22:37:06,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-23 22:37:06,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:37:06,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:06,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69122738] [2023-11-23 22:37:06,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:37:06,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034455578] [2023-11-23 22:37:06,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034455578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:06,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:06,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:37:06,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114196763] [2023-11-23 22:37:06,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:07,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:37:07,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:07,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:37:07,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:37:07,004 INFO L87 Difference]: Start difference. First operand 222 states and 364 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:07,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:07,351 INFO L93 Difference]: Finished difference Result 664 states and 1089 transitions. [2023-11-23 22:37:07,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:37:07,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 366 [2023-11-23 22:37:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:07,364 INFO L225 Difference]: With dead ends: 664 [2023-11-23 22:37:07,364 INFO L226 Difference]: Without dead ends: 443 [2023-11-23 22:37:07,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:37:07,369 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 285 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:07,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1154 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:37:07,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-11-23 22:37:07,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 316. [2023-11-23 22:37:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 201 states have (on average 1.427860696517413) internal successors, (287), 201 states have internal predecessors, (287), 112 states have call successors, (112), 2 states have call predecessors, (112), 2 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-23 22:37:07,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 511 transitions. [2023-11-23 22:37:07,466 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 511 transitions. Word has length 366 [2023-11-23 22:37:07,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:07,469 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 511 transitions. [2023-11-23 22:37:07,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:07,474 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 511 transitions. [2023-11-23 22:37:07,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2023-11-23 22:37:07,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:07,485 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:07,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:07,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:07,711 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:07,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:07,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1347749150, now seen corresponding path program 1 times [2023-11-23 22:37:07,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:07,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421844477] [2023-11-23 22:37:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:07,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:07,846 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:37:07,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786541436] [2023-11-23 22:37:07,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:07,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:07,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:07,857 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:07,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:37:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:08,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 22:37:08,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-23 22:37:09,709 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:37:09,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:09,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421844477] [2023-11-23 22:37:09,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:37:09,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786541436] [2023-11-23 22:37:09,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786541436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:09,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:09,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:37:09,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645316065] [2023-11-23 22:37:09,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:09,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:37:09,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:09,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:37:09,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:37:09,717 INFO L87 Difference]: Start difference. First operand 316 states and 511 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:10,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:10,036 INFO L93 Difference]: Finished difference Result 664 states and 1082 transitions. [2023-11-23 22:37:10,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:37:10,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 366 [2023-11-23 22:37:10,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:10,043 INFO L225 Difference]: With dead ends: 664 [2023-11-23 22:37:10,043 INFO L226 Difference]: Without dead ends: 443 [2023-11-23 22:37:10,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:37:10,046 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 357 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:10,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 879 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:37:10,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-11-23 22:37:10,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 418. [2023-11-23 22:37:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 303 states have (on average 1.5148514851485149) internal successors, (459), 303 states have internal predecessors, (459), 112 states have call successors, (112), 2 states have call predecessors, (112), 2 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-23 22:37:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 683 transitions. [2023-11-23 22:37:10,090 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 683 transitions. Word has length 366 [2023-11-23 22:37:10,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:10,092 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 683 transitions. [2023-11-23 22:37:10,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:10,093 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 683 transitions. [2023-11-23 22:37:10,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2023-11-23 22:37:10,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:10,100 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:10,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:10,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:10,315 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:10,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:10,315 INFO L85 PathProgramCache]: Analyzing trace with hash 992428753, now seen corresponding path program 1 times [2023-11-23 22:37:10,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:10,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579795707] [2023-11-23 22:37:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:10,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:10,419 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:37:10,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405886158] [2023-11-23 22:37:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:10,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:10,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:10,421 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:10,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:37:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:10,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 22:37:10,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-23 22:37:11,259 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:37:11,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:11,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579795707] [2023-11-23 22:37:11,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:37:11,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405886158] [2023-11-23 22:37:11,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405886158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:11,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:11,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:37:11,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498777506] [2023-11-23 22:37:11,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:11,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:37:11,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:11,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:37:11,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:37:11,267 INFO L87 Difference]: Start difference. First operand 418 states and 683 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:12,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:12,027 INFO L93 Difference]: Finished difference Result 930 states and 1498 transitions. [2023-11-23 22:37:12,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:37:12,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 368 [2023-11-23 22:37:12,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:12,034 INFO L225 Difference]: With dead ends: 930 [2023-11-23 22:37:12,034 INFO L226 Difference]: Without dead ends: 659 [2023-11-23 22:37:12,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:37:12,040 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 1283 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:12,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1283 Valid, 1157 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 22:37:12,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2023-11-23 22:37:12,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 426. [2023-11-23 22:37:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 309 states have (on average 1.4983818770226538) internal successors, (463), 309 states have internal predecessors, (463), 112 states have call successors, (112), 4 states have call predecessors, (112), 4 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-23 22:37:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 687 transitions. [2023-11-23 22:37:12,100 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 687 transitions. Word has length 368 [2023-11-23 22:37:12,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:12,104 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 687 transitions. [2023-11-23 22:37:12,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:12,105 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 687 transitions. [2023-11-23 22:37:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2023-11-23 22:37:12,113 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:12,113 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:12,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:12,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:12,337 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:12,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:12,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1416075475, now seen corresponding path program 1 times [2023-11-23 22:37:12,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:12,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854200303] [2023-11-23 22:37:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:12,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:12,421 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:37:12,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432489158] [2023-11-23 22:37:12,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:12,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:12,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:12,424 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:12,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:37:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:12,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 22:37:12,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-23 22:37:13,203 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:37:13,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:13,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854200303] [2023-11-23 22:37:13,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:37:13,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432489158] [2023-11-23 22:37:13,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432489158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:13,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:13,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:37:13,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093337039] [2023-11-23 22:37:13,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:13,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:37:13,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:13,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:37:13,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:37:13,208 INFO L87 Difference]: Start difference. First operand 426 states and 687 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:13,869 INFO L93 Difference]: Finished difference Result 1331 states and 2128 transitions. [2023-11-23 22:37:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:37:13,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 368 [2023-11-23 22:37:13,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:13,885 INFO L225 Difference]: With dead ends: 1331 [2023-11-23 22:37:13,885 INFO L226 Difference]: Without dead ends: 1083 [2023-11-23 22:37:13,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:37:13,887 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 1459 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 2001 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:13,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1459 Valid, 2001 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 22:37:13,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2023-11-23 22:37:13,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 709. [2023-11-23 22:37:13,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 534 states have (on average 1.5224719101123596) internal successors, (813), 534 states have internal predecessors, (813), 168 states have call successors, (168), 6 states have call predecessors, (168), 6 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2023-11-23 22:37:13,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1149 transitions. [2023-11-23 22:37:13,990 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1149 transitions. Word has length 368 [2023-11-23 22:37:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:13,992 INFO L495 AbstractCegarLoop]: Abstraction has 709 states and 1149 transitions. [2023-11-23 22:37:13,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:13,993 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1149 transitions. [2023-11-23 22:37:14,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2023-11-23 22:37:14,001 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:14,001 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:14,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:14,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:14,219 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:14,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:14,220 INFO L85 PathProgramCache]: Analyzing trace with hash 962704789, now seen corresponding path program 1 times [2023-11-23 22:37:14,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:14,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166792739] [2023-11-23 22:37:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:14,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:14,274 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:37:14,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045534761] [2023-11-23 22:37:14,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:14,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:14,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:14,276 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:14,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:37:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:14,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:37:14,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2013 proven. 132 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2023-11-23 22:37:15,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 33 proven. 132 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-23 22:37:15,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:15,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166792739] [2023-11-23 22:37:15,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:37:15,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045534761] [2023-11-23 22:37:15,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045534761] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:15,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:37:15,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-23 22:37:15,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596128665] [2023-11-23 22:37:15,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:15,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:37:15,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:15,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:37:15,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:37:15,659 INFO L87 Difference]: Start difference. First operand 709 states and 1149 transitions. Second operand has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2023-11-23 22:37:16,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:16,143 INFO L93 Difference]: Finished difference Result 1313 states and 2116 transitions. [2023-11-23 22:37:16,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:37:16,145 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) Word has length 368 [2023-11-23 22:37:16,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:16,151 INFO L225 Difference]: With dead ends: 1313 [2023-11-23 22:37:16,151 INFO L226 Difference]: Without dead ends: 733 [2023-11-23 22:37:16,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:37:16,155 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 442 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:16,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 607 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:37:16,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2023-11-23 22:37:16,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 721. [2023-11-23 22:37:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 543 states have (on average 1.4806629834254144) internal successors, (804), 543 states have internal predecessors, (804), 168 states have call successors, (168), 9 states have call predecessors, (168), 9 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2023-11-23 22:37:16,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1140 transitions. [2023-11-23 22:37:16,238 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1140 transitions. Word has length 368 [2023-11-23 22:37:16,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:16,239 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 1140 transitions. [2023-11-23 22:37:16,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2023-11-23 22:37:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1140 transitions. [2023-11-23 22:37:16,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2023-11-23 22:37:16,246 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:16,247 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:16,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:16,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 22:37:16,469 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:16,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:16,469 INFO L85 PathProgramCache]: Analyzing trace with hash 890318231, now seen corresponding path program 1 times [2023-11-23 22:37:16,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:16,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217876381] [2023-11-23 22:37:16,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:16,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:16,563 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:37:16,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520458210] [2023-11-23 22:37:16,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:16,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:16,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:16,565 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:16,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:37:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:16,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:37:16,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-23 22:37:16,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:37:16,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:16,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217876381] [2023-11-23 22:37:16,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:37:16,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520458210] [2023-11-23 22:37:16,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520458210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:16,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:16,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:37:16,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171587797] [2023-11-23 22:37:16,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:16,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:37:16,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:17,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:37:17,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:37:17,001 INFO L87 Difference]: Start difference. First operand 721 states and 1140 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:17,624 INFO L93 Difference]: Finished difference Result 1937 states and 3056 transitions. [2023-11-23 22:37:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:37:17,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 368 [2023-11-23 22:37:17,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:17,637 INFO L225 Difference]: With dead ends: 1937 [2023-11-23 22:37:17,637 INFO L226 Difference]: Without dead ends: 1337 [2023-11-23 22:37:17,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:37:17,640 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 566 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:17,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 967 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 22:37:17,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2023-11-23 22:37:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1031. [2023-11-23 22:37:17,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 851 states have (on average 1.509988249118684) internal successors, (1285), 851 states have internal predecessors, (1285), 168 states have call successors, (168), 11 states have call predecessors, (168), 11 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2023-11-23 22:37:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1621 transitions. [2023-11-23 22:37:17,787 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1621 transitions. Word has length 368 [2023-11-23 22:37:17,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:17,788 INFO L495 AbstractCegarLoop]: Abstraction has 1031 states and 1621 transitions. [2023-11-23 22:37:17,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:17,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1621 transitions. [2023-11-23 22:37:17,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2023-11-23 22:37:17,795 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:17,795 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:17,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:18,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 22:37:18,014 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:18,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:18,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1476376363, now seen corresponding path program 1 times [2023-11-23 22:37:18,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:18,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228689694] [2023-11-23 22:37:18,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:18,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:18,079 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:37:18,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604569010] [2023-11-23 22:37:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:18,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:18,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:18,081 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:18,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:37:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:18,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 22:37:18,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-23 22:37:18,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:37:18,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:18,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228689694] [2023-11-23 22:37:18,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:37:18,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604569010] [2023-11-23 22:37:18,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604569010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:18,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:18,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:37:18,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093578125] [2023-11-23 22:37:18,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:18,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:37:18,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:18,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:37:18,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:37:18,477 INFO L87 Difference]: Start difference. First operand 1031 states and 1621 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:18,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:18,632 INFO L93 Difference]: Finished difference Result 2221 states and 3465 transitions. [2023-11-23 22:37:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:37:18,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 368 [2023-11-23 22:37:18,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:18,644 INFO L225 Difference]: With dead ends: 2221 [2023-11-23 22:37:18,644 INFO L226 Difference]: Without dead ends: 1527 [2023-11-23 22:37:18,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:37:18,648 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 197 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:18,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 737 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:37:18,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2023-11-23 22:37:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1299. [2023-11-23 22:37:18,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1119 states have (on average 1.513851653261841) internal successors, (1694), 1119 states have internal predecessors, (1694), 168 states have call successors, (168), 11 states have call predecessors, (168), 11 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2023-11-23 22:37:18,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 2030 transitions. [2023-11-23 22:37:18,808 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 2030 transitions. Word has length 368 [2023-11-23 22:37:18,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:18,809 INFO L495 AbstractCegarLoop]: Abstraction has 1299 states and 2030 transitions. [2023-11-23 22:37:18,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:18,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 2030 transitions. [2023-11-23 22:37:18,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2023-11-23 22:37:18,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:18,816 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:18,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-23 22:37:19,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:19,021 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:19,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:19,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1538727255, now seen corresponding path program 1 times [2023-11-23 22:37:19,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:19,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944641487] [2023-11-23 22:37:19,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:19,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:19,080 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:37:19,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57336807] [2023-11-23 22:37:19,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:19,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:19,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:19,082 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:19,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:37:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:19,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 22:37:19,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-23 22:37:19,919 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:37:19,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:19,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944641487] [2023-11-23 22:37:19,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:37:19,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57336807] [2023-11-23 22:37:19,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57336807] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:19,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:19,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:37:19,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323102629] [2023-11-23 22:37:19,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:19,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:37:19,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:19,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:37:19,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:37:19,924 INFO L87 Difference]: Start difference. First operand 1299 states and 2030 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:20,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:20,832 INFO L93 Difference]: Finished difference Result 2666 states and 4144 transitions. [2023-11-23 22:37:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:37:20,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 368 [2023-11-23 22:37:20,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:20,845 INFO L225 Difference]: With dead ends: 2666 [2023-11-23 22:37:20,845 INFO L226 Difference]: Without dead ends: 1625 [2023-11-23 22:37:20,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:37:20,849 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 1132 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:20,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1132 Valid, 1731 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 22:37:20,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2023-11-23 22:37:20,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1135. [2023-11-23 22:37:20,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 955 states have (on average 1.4921465968586387) internal successors, (1425), 955 states have internal predecessors, (1425), 168 states have call successors, (168), 11 states have call predecessors, (168), 11 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2023-11-23 22:37:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1761 transitions. [2023-11-23 22:37:20,991 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1761 transitions. Word has length 368 [2023-11-23 22:37:20,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:20,992 INFO L495 AbstractCegarLoop]: Abstraction has 1135 states and 1761 transitions. [2023-11-23 22:37:20,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:20,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1761 transitions. [2023-11-23 22:37:20,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2023-11-23 22:37:20,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:20,997 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:21,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:21,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:21,214 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:21,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:21,215 INFO L85 PathProgramCache]: Analyzing trace with hash -653108084, now seen corresponding path program 1 times [2023-11-23 22:37:21,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:21,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041817219] [2023-11-23 22:37:21,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:21,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:21,273 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:37:21,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194938238] [2023-11-23 22:37:21,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:21,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:21,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:21,275 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:21,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 22:37:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:21,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 22:37:21,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2185 proven. 72 refuted. 0 times theorem prover too weak. 3903 trivial. 0 not checked. [2023-11-23 22:37:22,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 405 proven. 81 refuted. 0 times theorem prover too weak. 5674 trivial. 0 not checked. [2023-11-23 22:37:24,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:24,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041817219] [2023-11-23 22:37:24,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:37:24,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194938238] [2023-11-23 22:37:24,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194938238] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:24,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:37:24,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2023-11-23 22:37:24,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290358187] [2023-11-23 22:37:24,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:24,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-23 22:37:24,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:24,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-23 22:37:24,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2023-11-23 22:37:24,240 INFO L87 Difference]: Start difference. First operand 1135 states and 1761 transitions. Second operand has 28 states, 27 states have (on average 5.925925925925926) internal successors, (160), 26 states have internal predecessors, (160), 7 states have call successors, (112), 5 states have call predecessors, (112), 10 states have return successors, (112), 7 states have call predecessors, (112), 7 states have call successors, (112) [2023-11-23 22:37:30,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:30,122 INFO L93 Difference]: Finished difference Result 4410 states and 6750 transitions. [2023-11-23 22:37:30,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-23 22:37:30,122 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 5.925925925925926) internal successors, (160), 26 states have internal predecessors, (160), 7 states have call successors, (112), 5 states have call predecessors, (112), 10 states have return successors, (112), 7 states have call predecessors, (112), 7 states have call successors, (112) Word has length 369 [2023-11-23 22:37:30,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:30,150 INFO L225 Difference]: With dead ends: 4410 [2023-11-23 22:37:30,151 INFO L226 Difference]: Without dead ends: 3581 [2023-11-23 22:37:30,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 713 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1733, Invalid=5073, Unknown=0, NotChecked=0, Total=6806 [2023-11-23 22:37:30,157 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 6064 mSDsluCounter, 2130 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 1516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6065 SdHoareTripleChecker+Valid, 2473 SdHoareTripleChecker+Invalid, 3847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1516 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:30,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6065 Valid, 2473 Invalid, 3847 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1516 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-23 22:37:30,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3581 states. [2023-11-23 22:37:30,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3581 to 2052. [2023-11-23 22:37:30,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 1740 states have (on average 1.4770114942528736) internal successors, (2570), 1740 states have internal predecessors, (2570), 280 states have call successors, (280), 31 states have call predecessors, (280), 31 states have return successors, (280), 280 states have call predecessors, (280), 280 states have call successors, (280) [2023-11-23 22:37:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 3130 transitions. [2023-11-23 22:37:30,526 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 3130 transitions. Word has length 369 [2023-11-23 22:37:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:30,528 INFO L495 AbstractCegarLoop]: Abstraction has 2052 states and 3130 transitions. [2023-11-23 22:37:30,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 5.925925925925926) internal successors, (160), 26 states have internal predecessors, (160), 7 states have call successors, (112), 5 states have call predecessors, (112), 10 states have return successors, (112), 7 states have call predecessors, (112), 7 states have call successors, (112) [2023-11-23 22:37:30,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 3130 transitions. [2023-11-23 22:37:30,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2023-11-23 22:37:30,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:30,534 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:30,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:30,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 22:37:30,750 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:30,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:30,751 INFO L85 PathProgramCache]: Analyzing trace with hash -230406258, now seen corresponding path program 1 times [2023-11-23 22:37:30,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:30,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755142154] [2023-11-23 22:37:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:30,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:30,806 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:37:30,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992282593] [2023-11-23 22:37:30,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:30,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:30,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:30,809 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:30,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 22:37:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:31,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:37:31,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-23 22:37:31,656 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:37:31,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:31,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755142154] [2023-11-23 22:37:31,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:37:31,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992282593] [2023-11-23 22:37:31,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992282593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:31,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:31,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:37:31,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084336697] [2023-11-23 22:37:31,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:31,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:37:31,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:31,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:37:31,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:37:31,662 INFO L87 Difference]: Start difference. First operand 2052 states and 3130 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:31,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:31,926 INFO L93 Difference]: Finished difference Result 3625 states and 5541 transitions. [2023-11-23 22:37:31,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:37:31,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 369 [2023-11-23 22:37:31,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:31,946 INFO L225 Difference]: With dead ends: 3625 [2023-11-23 22:37:31,946 INFO L226 Difference]: Without dead ends: 2054 [2023-11-23 22:37:31,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:37:31,951 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 143 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:31,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 891 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:37:31,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2023-11-23 22:37:32,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 2052. [2023-11-23 22:37:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 1740 states have (on average 1.4701149425287356) internal successors, (2558), 1740 states have internal predecessors, (2558), 280 states have call successors, (280), 31 states have call predecessors, (280), 31 states have return successors, (280), 280 states have call predecessors, (280), 280 states have call successors, (280) [2023-11-23 22:37:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 3118 transitions. [2023-11-23 22:37:32,254 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 3118 transitions. Word has length 369 [2023-11-23 22:37:32,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:32,255 INFO L495 AbstractCegarLoop]: Abstraction has 2052 states and 3118 transitions. [2023-11-23 22:37:32,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:32,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 3118 transitions. [2023-11-23 22:37:32,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2023-11-23 22:37:32,260 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:32,261 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:32,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:32,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:32,484 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:32,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:32,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2070416332, now seen corresponding path program 1 times [2023-11-23 22:37:32,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:32,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100939154] [2023-11-23 22:37:32,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:32,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:32,571 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:37:32,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003351525] [2023-11-23 22:37:32,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:32,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:32,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:32,583 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:32,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 22:37:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:32,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 22:37:32,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-23 22:37:35,098 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:37:35,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:35,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100939154] [2023-11-23 22:37:35,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:37:35,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003351525] [2023-11-23 22:37:35,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003351525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:35,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:35,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 22:37:35,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630188707] [2023-11-23 22:37:35,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:35,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:37:35,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:35,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:37:35,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:37:35,102 INFO L87 Difference]: Start difference. First operand 2052 states and 3118 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 7 states have internal predecessors, (92), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:37,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:37,105 INFO L93 Difference]: Finished difference Result 6878 states and 10446 transitions. [2023-11-23 22:37:37,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 22:37:37,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 7 states have internal predecessors, (92), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 369 [2023-11-23 22:37:37,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:37,138 INFO L225 Difference]: With dead ends: 6878 [2023-11-23 22:37:37,138 INFO L226 Difference]: Without dead ends: 5152 [2023-11-23 22:37:37,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:37:37,144 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 2011 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2011 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:37,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2011 Valid, 1969 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 22:37:37,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5152 states. [2023-11-23 22:37:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5152 to 4229. [2023-11-23 22:37:37,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4229 states, 3421 states have (on average 1.4367144109909382) internal successors, (4915), 3421 states have internal predecessors, (4915), 728 states have call successors, (728), 79 states have call predecessors, (728), 79 states have return successors, (728), 728 states have call predecessors, (728), 728 states have call successors, (728) [2023-11-23 22:37:37,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4229 states to 4229 states and 6371 transitions. [2023-11-23 22:37:37,850 INFO L78 Accepts]: Start accepts. Automaton has 4229 states and 6371 transitions. Word has length 369 [2023-11-23 22:37:37,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:37,851 INFO L495 AbstractCegarLoop]: Abstraction has 4229 states and 6371 transitions. [2023-11-23 22:37:37,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 7 states have internal predecessors, (92), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:37,851 INFO L276 IsEmpty]: Start isEmpty. Operand 4229 states and 6371 transitions. [2023-11-23 22:37:37,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2023-11-23 22:37:37,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:37,857 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:37,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:38,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:38,070 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:38,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:38,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1560943242, now seen corresponding path program 1 times [2023-11-23 22:37:38,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:38,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675665073] [2023-11-23 22:37:38,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:38,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:38,133 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:37:38,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846483429] [2023-11-23 22:37:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:38,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:38,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:38,135 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:38,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 22:37:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:38,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:37:38,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-23 22:37:38,569 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:37:38,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:38,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675665073] [2023-11-23 22:37:38,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:37:38,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846483429] [2023-11-23 22:37:38,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846483429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:38,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:38,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:37:38,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873087761] [2023-11-23 22:37:38,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:38,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:37:38,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:38,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:37:38,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:37:38,576 INFO L87 Difference]: Start difference. First operand 4229 states and 6371 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:39,346 INFO L93 Difference]: Finished difference Result 9629 states and 14534 transitions. [2023-11-23 22:37:39,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:37:39,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 369 [2023-11-23 22:37:39,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:39,389 INFO L225 Difference]: With dead ends: 9629 [2023-11-23 22:37:39,389 INFO L226 Difference]: Without dead ends: 6197 [2023-11-23 22:37:39,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:37:39,400 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 202 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:39,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 891 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:37:39,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6197 states. [2023-11-23 22:37:40,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6197 to 4437. [2023-11-23 22:37:40,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4437 states, 3629 states have (on average 1.4329016257922293) internal successors, (5200), 3629 states have internal predecessors, (5200), 728 states have call successors, (728), 79 states have call predecessors, (728), 79 states have return successors, (728), 728 states have call predecessors, (728), 728 states have call successors, (728) [2023-11-23 22:37:40,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4437 states to 4437 states and 6656 transitions. [2023-11-23 22:37:40,136 INFO L78 Accepts]: Start accepts. Automaton has 4437 states and 6656 transitions. Word has length 369 [2023-11-23 22:37:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:40,137 INFO L495 AbstractCegarLoop]: Abstraction has 4437 states and 6656 transitions. [2023-11-23 22:37:40,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:40,138 INFO L276 IsEmpty]: Start isEmpty. Operand 4437 states and 6656 transitions. [2023-11-23 22:37:40,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2023-11-23 22:37:40,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:40,144 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:40,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:40,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 22:37:40,352 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:40,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:40,352 INFO L85 PathProgramCache]: Analyzing trace with hash 281079564, now seen corresponding path program 1 times [2023-11-23 22:37:40,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:40,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209582865] [2023-11-23 22:37:40,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:40,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:40,400 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:37:40,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1522583478] [2023-11-23 22:37:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:40,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:40,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:40,402 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:40,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 22:37:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:40,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 22:37:40,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3129 proven. 78 refuted. 0 times theorem prover too weak. 2953 trivial. 0 not checked. [2023-11-23 22:37:41,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-23 22:37:41,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:41,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209582865] [2023-11-23 22:37:41,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:37:41,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522583478] [2023-11-23 22:37:41,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522583478] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:41,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:37:41,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-11-23 22:37:41,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537788012] [2023-11-23 22:37:41,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:41,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:37:41,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:41,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:37:41,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:37:41,484 INFO L87 Difference]: Start difference. First operand 4437 states and 6656 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:37:42,968 INFO L93 Difference]: Finished difference Result 12847 states and 19208 transitions. [2023-11-23 22:37:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:37:42,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 369 [2023-11-23 22:37:42,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:37:43,001 INFO L225 Difference]: With dead ends: 12847 [2023-11-23 22:37:43,001 INFO L226 Difference]: Without dead ends: 9279 [2023-11-23 22:37:43,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:37:43,013 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 297 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:37:43,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 1147 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 22:37:43,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9279 states. [2023-11-23 22:37:44,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9279 to 7585. [2023-11-23 22:37:44,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7585 states, 6416 states have (on average 1.4359413965087282) internal successors, (9213), 6428 states have internal predecessors, (9213), 1064 states have call successors, (1064), 104 states have call predecessors, (1064), 104 states have return successors, (1064), 1052 states have call predecessors, (1064), 1064 states have call successors, (1064) [2023-11-23 22:37:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7585 states to 7585 states and 11341 transitions. [2023-11-23 22:37:44,090 INFO L78 Accepts]: Start accepts. Automaton has 7585 states and 11341 transitions. Word has length 369 [2023-11-23 22:37:44,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:37:44,091 INFO L495 AbstractCegarLoop]: Abstraction has 7585 states and 11341 transitions. [2023-11-23 22:37:44,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-23 22:37:44,091 INFO L276 IsEmpty]: Start isEmpty. Operand 7585 states and 11341 transitions. [2023-11-23 22:37:44,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-23 22:37:44,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:37:44,100 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:44,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:44,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 22:37:44,323 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:37:44,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:44,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1585376828, now seen corresponding path program 1 times [2023-11-23 22:37:44,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:44,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771830926] [2023-11-23 22:37:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:44,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:44,372 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:37:44,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800797531] [2023-11-23 22:37:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:44,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:44,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:44,374 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:44,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abaeed3d-a653-454a-8b1f-6cda45bfc02a/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 22:37:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:44,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:37:44,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2673 proven. 114 refuted. 0 times theorem prover too weak. 3373 trivial. 0 not checked. [2023-11-23 22:37:45,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 51 proven. 114 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-23 22:37:45,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:45,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771830926] [2023-11-23 22:37:45,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:37:45,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800797531] [2023-11-23 22:37:45,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800797531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:45,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:37:45,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-23 22:37:45,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896107917] [2023-11-23 22:37:45,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:45,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:37:45,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:45,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:37:45,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:37:45,437 INFO L87 Difference]: Start difference. First operand 7585 states and 11341 transitions. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 3 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95)