./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu --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 a74358cfc3b57ddf641c2843362a5594690e287c76148ee1838c9104dbe09de1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:45:45,672 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:45:45,765 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:45:45,771 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:45:45,771 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:45:45,796 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:45:45,797 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:45:45,797 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:45:45,798 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:45:45,799 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:45:45,800 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:45:45,800 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:45:45,801 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:45:45,801 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:45:45,802 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:45:45,802 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:45:45,803 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:45:45,803 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:45:45,804 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:45:45,804 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:45:45,805 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:45:45,805 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:45:45,806 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:45:45,806 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:45:45,807 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:45:45,807 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:45:45,807 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:45:45,808 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:45:45,808 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:45:45,809 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:45:45,809 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:45:45,809 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:45:45,810 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:45:45,810 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:45:45,810 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:45:45,810 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:45:45,811 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:45:45,811 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:45:45,811 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:45:45,811 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_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a74358cfc3b57ddf641c2843362a5594690e287c76148ee1838c9104dbe09de1 [2023-11-19 07:45:46,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:45:46,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:45:46,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:45:46,088 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:45:46,089 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:45:46,090 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-1.i [2023-11-19 07:45:49,336 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:45:49,822 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:45:49,827 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-1.i [2023-11-19 07:45:49,849 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/data/43d8adfe4/7346925364d04d808a5f89251224c401/FLAG5dc78b652 [2023-11-19 07:45:49,861 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/data/43d8adfe4/7346925364d04d808a5f89251224c401 [2023-11-19 07:45:49,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:45:49,866 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:45:49,867 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:45:49,867 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:45:49,872 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:45:49,873 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:45:49" (1/1) ... [2023-11-19 07:45:49,874 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40708d6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:49, skipping insertion in model container [2023-11-19 07:45:49,874 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:45:49" (1/1) ... [2023-11-19 07:45:49,939 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:45:50,411 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_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-1.i[33021,33034] [2023-11-19 07:45:50,530 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:45:50,550 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:45:50,602 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_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-1.i[33021,33034] [2023-11-19 07:45:50,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:45:50,747 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:45:50,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:50 WrapperNode [2023-11-19 07:45:50,748 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:45:50,750 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:45:50,750 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:45:50,750 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:45:50,757 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:50" (1/1) ... [2023-11-19 07:45:50,804 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:50" (1/1) ... [2023-11-19 07:45:50,887 INFO L138 Inliner]: procedures = 177, calls = 186, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 790 [2023-11-19 07:45:50,887 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:45:50,888 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:45:50,888 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:45:50,888 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:45:50,898 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:50" (1/1) ... [2023-11-19 07:45:50,899 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:50" (1/1) ... [2023-11-19 07:45:50,908 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:50" (1/1) ... [2023-11-19 07:45:50,909 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:50" (1/1) ... [2023-11-19 07:45:50,944 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:50" (1/1) ... [2023-11-19 07:45:50,954 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:50" (1/1) ... [2023-11-19 07:45:50,959 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:50" (1/1) ... [2023-11-19 07:45:50,964 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:50" (1/1) ... [2023-11-19 07:45:50,979 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:45:50,980 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:45:50,980 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:45:50,981 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:45:50,981 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:50" (1/1) ... [2023-11-19 07:45:50,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:45:51,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:51,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:45:51,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:45:51,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:45:51,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 07:45:51,058 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 07:45:51,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:45:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-19 07:45:51,059 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-19 07:45:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:45:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:45:51,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:45:51,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 07:45:51,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:45:51,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:45:51,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:45:51,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:45:51,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:45:51,264 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:45:51,267 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:45:52,508 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:45:52,523 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:45:52,524 INFO L302 CfgBuilder]: Removed 31 assume(true) statements. [2023-11-19 07:45:52,535 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:45:52 BoogieIcfgContainer [2023-11-19 07:45:52,535 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:45:52,574 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:45:52,575 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:45:52,585 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:45:52,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:45:49" (1/3) ... [2023-11-19 07:45:52,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad0781c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:45:52, skipping insertion in model container [2023-11-19 07:45:52,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:50" (2/3) ... [2023-11-19 07:45:52,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad0781c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:45:52, skipping insertion in model container [2023-11-19 07:45:52,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:45:52" (3/3) ... [2023-11-19 07:45:52,591 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test1-1.i [2023-11-19 07:45:52,640 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:45:52,640 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:45:52,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:45:52,717 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;@60173120, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:45:52,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:45:52,732 INFO L276 IsEmpty]: Start isEmpty. Operand has 213 states, 196 states have (on average 1.683673469387755) internal successors, (330), 207 states have internal predecessors, (330), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 07:45:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 07:45:52,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:52,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:52,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:52,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:52,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1530581310, now seen corresponding path program 1 times [2023-11-19 07:45:52,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:52,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123569843] [2023-11-19 07:45:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:52,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:53,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:53,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123569843] [2023-11-19 07:45:53,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123569843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:53,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:53,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:45:53,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810475729] [2023-11-19 07:45:53,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:53,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:53,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:53,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:53,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:53,107 INFO L87 Difference]: Start difference. First operand has 213 states, 196 states have (on average 1.683673469387755) internal successors, (330), 207 states have internal predecessors, (330), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:53,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:53,301 INFO L93 Difference]: Finished difference Result 596 states and 1014 transitions. [2023-11-19 07:45:53,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:53,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 07:45:53,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:53,330 INFO L225 Difference]: With dead ends: 596 [2023-11-19 07:45:53,330 INFO L226 Difference]: Without dead ends: 381 [2023-11-19 07:45:53,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:53,343 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 252 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:53,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 631 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:45:53,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-11-19 07:45:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 210. [2023-11-19 07:45:53,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 194 states have (on average 1.5) internal successors, (291), 204 states have internal predecessors, (291), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 07:45:53,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 317 transitions. [2023-11-19 07:45:53,424 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 317 transitions. Word has length 10 [2023-11-19 07:45:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:53,425 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 317 transitions. [2023-11-19 07:45:53,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:53,426 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 317 transitions. [2023-11-19 07:45:53,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-19 07:45:53,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:53,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:53,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:45:53,433 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:53,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:53,434 INFO L85 PathProgramCache]: Analyzing trace with hash 545589277, now seen corresponding path program 1 times [2023-11-19 07:45:53,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:53,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836314859] [2023-11-19 07:45:53,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:53,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:53,523 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:53,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138156717] [2023-11-19 07:45:53,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:53,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:53,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:53,527 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:53,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:45:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:53,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:45:53,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:53,866 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:45:53,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:53,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836314859] [2023-11-19 07:45:53,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:53,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138156717] [2023-11-19 07:45:53,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138156717] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:53,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:53,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:45:53,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432904118] [2023-11-19 07:45:53,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:53,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:53,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:53,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:53,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:53,871 INFO L87 Difference]: Start difference. First operand 210 states and 317 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:53,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:53,965 INFO L93 Difference]: Finished difference Result 438 states and 662 transitions. [2023-11-19 07:45:53,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:53,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2023-11-19 07:45:53,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:53,968 INFO L225 Difference]: With dead ends: 438 [2023-11-19 07:45:53,968 INFO L226 Difference]: Without dead ends: 231 [2023-11-19 07:45:53,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:53,971 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 9 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:53,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 577 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:45:53,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-11-19 07:45:53,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2023-11-19 07:45:53,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 214 states have (on average 1.4532710280373833) internal successors, (311), 224 states have internal predecessors, (311), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 07:45:53,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 337 transitions. [2023-11-19 07:45:53,990 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 337 transitions. Word has length 85 [2023-11-19 07:45:53,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:53,990 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 337 transitions. [2023-11-19 07:45:53,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 337 transitions. [2023-11-19 07:45:53,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-19 07:45:53,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:53,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:54,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:54,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 07:45:54,218 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:54,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:54,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1038215451, now seen corresponding path program 1 times [2023-11-19 07:45:54,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:54,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764645195] [2023-11-19 07:45:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:54,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:54,314 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:54,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495958361] [2023-11-19 07:45:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:54,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:54,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:54,324 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:54,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:45:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:54,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:45:54,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:54,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:45:54,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:54,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764645195] [2023-11-19 07:45:54,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:54,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495958361] [2023-11-19 07:45:54,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495958361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:54,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:54,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:45:54,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544875442] [2023-11-19 07:45:54,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:54,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:45:54,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:54,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:45:54,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:45:54,635 INFO L87 Difference]: Start difference. First operand 230 states and 337 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:54,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:54,717 INFO L93 Difference]: Finished difference Result 444 states and 658 transitions. [2023-11-19 07:45:54,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:45:54,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2023-11-19 07:45:54,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:54,720 INFO L225 Difference]: With dead ends: 444 [2023-11-19 07:45:54,720 INFO L226 Difference]: Without dead ends: 217 [2023-11-19 07:45:54,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:45:54,722 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 165 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:54,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 713 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:45:54,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-11-19 07:45:54,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2023-11-19 07:45:54,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 200 states have (on average 1.45) internal successors, (290), 210 states have internal predecessors, (290), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 07:45:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 316 transitions. [2023-11-19 07:45:54,736 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 316 transitions. Word has length 85 [2023-11-19 07:45:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:54,736 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 316 transitions. [2023-11-19 07:45:54,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:54,737 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 316 transitions. [2023-11-19 07:45:54,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-19 07:45:54,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:54,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:54,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:54,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:54,960 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:54,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:54,961 INFO L85 PathProgramCache]: Analyzing trace with hash 376537641, now seen corresponding path program 1 times [2023-11-19 07:45:54,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:54,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003614864] [2023-11-19 07:45:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:54,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:55,007 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:55,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127774476] [2023-11-19 07:45:55,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:55,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:55,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:55,010 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:55,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:45:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:55,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:45:55,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:55,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:55,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:55,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003614864] [2023-11-19 07:45:55,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:55,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127774476] [2023-11-19 07:45:55,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127774476] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:55,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:45:55,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-19 07:45:55,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845230936] [2023-11-19 07:45:55,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:55,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:45:55,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:55,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:45:55,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:45:55,578 INFO L87 Difference]: Start difference. First operand 216 states and 316 transitions. Second operand has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:55,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:55,682 INFO L93 Difference]: Finished difference Result 781 states and 1143 transitions. [2023-11-19 07:45:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:45:55,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2023-11-19 07:45:55,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:55,689 INFO L225 Difference]: With dead ends: 781 [2023-11-19 07:45:55,689 INFO L226 Difference]: Without dead ends: 750 [2023-11-19 07:45:55,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:45:55,691 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 964 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:55,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1291 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:45:55,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2023-11-19 07:45:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2023-11-19 07:45:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 725 states have (on average 1.4427586206896552) internal successors, (1046), 735 states have internal predecessors, (1046), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-19 07:45:55,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1090 transitions. [2023-11-19 07:45:55,728 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1090 transitions. Word has length 85 [2023-11-19 07:45:55,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:55,729 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 1090 transitions. [2023-11-19 07:45:55,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:55,730 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1090 transitions. [2023-11-19 07:45:55,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-19 07:45:55,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:55,742 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:55,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:55,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:55,964 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:55,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:55,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1997604350, now seen corresponding path program 2 times [2023-11-19 07:45:55,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:55,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124659855] [2023-11-19 07:45:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:55,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:56,127 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:56,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437528949] [2023-11-19 07:45:56,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:45:56,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:56,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:56,135 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:56,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:45:56,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:45:56,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:45:56,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:45:56,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-11-19 07:45:57,785 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:45:57,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:57,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124659855] [2023-11-19 07:45:57,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:57,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437528949] [2023-11-19 07:45:57,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437528949] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:57,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:57,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:45:57,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956584885] [2023-11-19 07:45:57,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:57,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:45:57,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:57,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:45:57,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:45:57,794 INFO L87 Difference]: Start difference. First operand 750 states and 1090 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:58,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:58,041 INFO L93 Difference]: Finished difference Result 1369 states and 1987 transitions. [2023-11-19 07:45:58,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:58,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 310 [2023-11-19 07:45:58,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:58,048 INFO L225 Difference]: With dead ends: 1369 [2023-11-19 07:45:58,048 INFO L226 Difference]: Without dead ends: 748 [2023-11-19 07:45:58,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:45:58,050 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 123 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:58,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 874 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:45:58,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2023-11-19 07:45:58,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2023-11-19 07:45:58,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 723 states have (on average 1.4426002766251729) internal successors, (1043), 733 states have internal predecessors, (1043), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-19 07:45:58,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1087 transitions. [2023-11-19 07:45:58,112 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1087 transitions. Word has length 310 [2023-11-19 07:45:58,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:58,113 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 1087 transitions. [2023-11-19 07:45:58,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:58,116 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1087 transitions. [2023-11-19 07:45:58,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2023-11-19 07:45:58,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:58,124 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:58,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:58,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:58,348 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:58,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:58,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1159946007, now seen corresponding path program 1 times [2023-11-19 07:45:58,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:58,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755346177] [2023-11-19 07:45:58,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:58,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:58,517 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:58,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395792099] [2023-11-19 07:45:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:58,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:58,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:58,519 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:58,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:45:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:59,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 1633 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:45:59,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 448 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:45:59,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:46:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 448 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:46:00,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:00,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755346177] [2023-11-19 07:46:00,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:00,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395792099] [2023-11-19 07:46:00,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395792099] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:46:00,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:46:00,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-19 07:46:00,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001250456] [2023-11-19 07:46:00,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:46:00,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:46:00,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:00,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:46:00,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:46:00,365 INFO L87 Difference]: Start difference. First operand 748 states and 1087 transitions. Second operand has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 states have internal predecessors, (624), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:46:00,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:00,747 INFO L93 Difference]: Finished difference Result 1847 states and 2691 transitions. [2023-11-19 07:46:00,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:46:00,748 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 states have internal predecessors, (624), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 325 [2023-11-19 07:46:00,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:00,764 INFO L225 Difference]: With dead ends: 1847 [2023-11-19 07:46:00,764 INFO L226 Difference]: Without dead ends: 1816 [2023-11-19 07:46:00,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:46:00,770 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 3189 mSDsluCounter, 2531 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3215 SdHoareTripleChecker+Valid, 2877 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:00,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3215 Valid, 2877 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:46:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2023-11-19 07:46:00,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1816. [2023-11-19 07:46:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1773 states have (on average 1.4410603496897914) internal successors, (2555), 1783 states have internal predecessors, (2555), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-19 07:46:00,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2635 transitions. [2023-11-19 07:46:00,839 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2635 transitions. Word has length 325 [2023-11-19 07:46:00,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:00,841 INFO L495 AbstractCegarLoop]: Abstraction has 1816 states and 2635 transitions. [2023-11-19 07:46:00,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 states have internal predecessors, (624), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:46:00,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2635 transitions. [2023-11-19 07:46:00,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-11-19 07:46:00,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:00,868 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:00,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:01,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:01,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:01,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:01,084 INFO L85 PathProgramCache]: Analyzing trace with hash 735373321, now seen corresponding path program 2 times [2023-11-19 07:46:01,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:01,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612467850] [2023-11-19 07:46:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:01,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:01,472 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:01,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650891831] [2023-11-19 07:46:01,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:46:01,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:01,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:01,474 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:01,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:46:08,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:46:08,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:46:08,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 3775 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 07:46:08,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:08,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2023-11-19 07:46:09,130 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:46:09,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 26 [2023-11-19 07:46:09,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 3082 trivial. 0 not checked. [2023-11-19 07:46:09,403 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:09,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:09,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612467850] [2023-11-19 07:46:09,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:09,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650891831] [2023-11-19 07:46:09,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650891831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:09,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:09,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-19 07:46:09,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210908673] [2023-11-19 07:46:09,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:09,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:46:09,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:09,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:46:09,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:46:09,407 INFO L87 Difference]: Start difference. First operand 1816 states and 2635 transitions. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:46:12,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:12,053 INFO L93 Difference]: Finished difference Result 3592 states and 5203 transitions. [2023-11-19 07:46:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:46:12,058 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 775 [2023-11-19 07:46:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:12,079 INFO L225 Difference]: With dead ends: 3592 [2023-11-19 07:46:12,079 INFO L226 Difference]: Without dead ends: 1857 [2023-11-19 07:46:12,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 765 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:46:12,091 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 499 mSDsluCounter, 1825 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:12,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 2160 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 07:46:12,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2023-11-19 07:46:12,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1848. [2023-11-19 07:46:12,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1805 states have (on average 1.43601108033241) internal successors, (2592), 1815 states have internal predecessors, (2592), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-19 07:46:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 2672 transitions. [2023-11-19 07:46:12,160 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 2672 transitions. Word has length 775 [2023-11-19 07:46:12,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:12,160 INFO L495 AbstractCegarLoop]: Abstraction has 1848 states and 2672 transitions. [2023-11-19 07:46:12,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:46:12,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 2672 transitions. [2023-11-19 07:46:12,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-11-19 07:46:12,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:12,192 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:12,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:12,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:46:12,408 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:12,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:12,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1313766261, now seen corresponding path program 1 times [2023-11-19 07:46:12,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:12,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906228980] [2023-11-19 07:46:12,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:12,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:12,891 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:12,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850441486] [2023-11-19 07:46:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:12,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:12,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:12,908 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:12,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:46:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:14,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 3773 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:46:14,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 3145 trivial. 0 not checked. [2023-11-19 07:46:14,571 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:14,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:14,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906228980] [2023-11-19 07:46:14,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:14,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850441486] [2023-11-19 07:46:14,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850441486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:14,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:14,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:46:14,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213896990] [2023-11-19 07:46:14,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:14,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:46:14,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:14,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:46:14,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:46:14,575 INFO L87 Difference]: Start difference. First operand 1848 states and 2672 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:46:14,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:14,765 INFO L93 Difference]: Finished difference Result 4663 states and 6858 transitions. [2023-11-19 07:46:14,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:46:14,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 775 [2023-11-19 07:46:14,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:14,783 INFO L225 Difference]: With dead ends: 4663 [2023-11-19 07:46:14,784 INFO L226 Difference]: Without dead ends: 2916 [2023-11-19 07:46:14,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:46:14,788 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 142 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:14,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1143 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:46:14,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2023-11-19 07:46:14,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 2055. [2023-11-19 07:46:14,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2012 states have (on average 1.3986083499005963) internal successors, (2814), 2022 states have internal predecessors, (2814), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-19 07:46:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 2894 transitions. [2023-11-19 07:46:14,873 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 2894 transitions. Word has length 775 [2023-11-19 07:46:14,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:14,873 INFO L495 AbstractCegarLoop]: Abstraction has 2055 states and 2894 transitions. [2023-11-19 07:46:14,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:46:14,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 2894 transitions. [2023-11-19 07:46:14,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 777 [2023-11-19 07:46:14,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:14,885 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:14,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:15,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:46:15,100 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:15,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:15,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1292134931, now seen corresponding path program 1 times [2023-11-19 07:46:15,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:15,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269975071] [2023-11-19 07:46:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:15,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:15,474 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:15,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306657563] [2023-11-19 07:46:15,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:15,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:15,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:15,476 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:15,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:46:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:32,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 3776 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 07:46:32,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:33,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-19 07:46:33,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:46:33,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-19 07:46:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 883 proven. 32 refuted. 0 times theorem prover too weak. 2456 trivial. 0 not checked. [2023-11-19 07:46:33,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:46:34,393 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:46:34,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-19 07:46:35,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:35,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269975071] [2023-11-19 07:46:35,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:35,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306657563] [2023-11-19 07:46:35,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306657563] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:46:35,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:46:35,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-19 07:46:35,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028784029] [2023-11-19 07:46:35,848 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:46:35,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:46:35,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:35,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:46:35,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:46:35,851 INFO L87 Difference]: Start difference. First operand 2055 states and 2894 transitions. Second operand has 13 states, 13 states have (on average 15.384615384615385) internal successors, (200), 13 states have internal predecessors, (200), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:46:40,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:40,035 INFO L93 Difference]: Finished difference Result 3812 states and 5375 transitions. [2023-11-19 07:46:40,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:46:40,036 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 15.384615384615385) internal successors, (200), 13 states have internal predecessors, (200), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 776 [2023-11-19 07:46:40,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:40,049 INFO L225 Difference]: With dead ends: 3812 [2023-11-19 07:46:40,049 INFO L226 Difference]: Without dead ends: 2069 [2023-11-19 07:46:40,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1488 GetRequests, 1459 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2023-11-19 07:46:40,053 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 946 mSDsluCounter, 2803 mSDsCounter, 0 mSdLazyCounter, 2607 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 3360 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:40,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [949 Valid, 3360 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2607 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-19 07:46:40,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2023-11-19 07:46:40,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 2064. [2023-11-19 07:46:40,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2021 states have (on average 1.396833250865908) internal successors, (2823), 2031 states have internal predecessors, (2823), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-19 07:46:40,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 2903 transitions. [2023-11-19 07:46:40,121 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 2903 transitions. Word has length 776 [2023-11-19 07:46:40,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:40,122 INFO L495 AbstractCegarLoop]: Abstraction has 2064 states and 2903 transitions. [2023-11-19 07:46:40,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.384615384615385) internal successors, (200), 13 states have internal predecessors, (200), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:46:40,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 2903 transitions. [2023-11-19 07:46:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 777 [2023-11-19 07:46:40,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:40,134 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:40,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:40,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 07:46:40,335 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:40,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:40,335 INFO L85 PathProgramCache]: Analyzing trace with hash -574936805, now seen corresponding path program 1 times [2023-11-19 07:46:40,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:40,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637156145] [2023-11-19 07:46:40,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:40,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:40,698 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:40,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016725789] [2023-11-19 07:46:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:40,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:40,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:40,704 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:40,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:46:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:42,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 3768 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:46:42,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 837 proven. 0 refuted. 0 times theorem prover too weak. 2534 trivial. 0 not checked. [2023-11-19 07:46:42,545 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:42,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:42,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637156145] [2023-11-19 07:46:42,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:42,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016725789] [2023-11-19 07:46:42,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016725789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:42,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:42,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:46:42,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211839135] [2023-11-19 07:46:42,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:42,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:46:42,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:42,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:46:42,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:46:42,550 INFO L87 Difference]: Start difference. First operand 2064 states and 2903 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:46:42,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:42,643 INFO L93 Difference]: Finished difference Result 3399 states and 4753 transitions. [2023-11-19 07:46:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:46:42,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 776 [2023-11-19 07:46:42,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:42,654 INFO L225 Difference]: With dead ends: 3399 [2023-11-19 07:46:42,654 INFO L226 Difference]: Without dead ends: 1366 [2023-11-19 07:46:42,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 773 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:46:42,658 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 78 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:42,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 581 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:46:42,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2023-11-19 07:46:42,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1366. [2023-11-19 07:46:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1323 states have (on average 1.347694633408919) internal successors, (1783), 1333 states have internal predecessors, (1783), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-19 07:46:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1863 transitions. [2023-11-19 07:46:42,722 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1863 transitions. Word has length 776 [2023-11-19 07:46:42,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:42,723 INFO L495 AbstractCegarLoop]: Abstraction has 1366 states and 1863 transitions. [2023-11-19 07:46:42,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:46:42,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1863 transitions. [2023-11-19 07:46:42,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2023-11-19 07:46:42,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:42,733 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:42,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:42,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:46:42,960 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:42,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:42,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1569793289, now seen corresponding path program 2 times [2023-11-19 07:46:42,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:42,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024408812] [2023-11-19 07:46:42,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:42,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:43,310 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:43,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262809659] [2023-11-19 07:46:43,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:46:43,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:43,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:43,312 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:43,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9e9e51e-c720-4abe-98e6-1a2d9000b8b0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process