./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.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_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/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_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/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_b762fb5e-77b5-4da2-988e-9efe10bf1935/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 89806bf5e92e08240ee093afcceea93b900865db28253b34ac5f2402fc0c0eb8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:47:44,412 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:47:44,536 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:47:44,555 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:47:44,557 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:47:44,602 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:47:44,603 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:47:44,603 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:47:44,604 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:47:44,605 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:47:44,606 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:47:44,607 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:47:44,607 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:47:44,608 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:47:44,609 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:47:44,609 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:47:44,610 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:47:44,610 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:47:44,611 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:47:44,612 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:47:44,612 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:47:44,613 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:47:44,614 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:47:44,614 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:47:44,615 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:47:44,616 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:47:44,616 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:47:44,617 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:47:44,617 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:47:44,618 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:47:44,619 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:47:44,620 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:47:44,620 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:47:44,620 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:47:44,621 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:47:44,621 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:47:44,621 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:47:44,621 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:47:44,622 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:47:44,622 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_b762fb5e-77b5-4da2-988e-9efe10bf1935/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89806bf5e92e08240ee093afcceea93b900865db28253b34ac5f2402fc0c0eb8 [2023-11-19 07:47:44,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:47:44,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:47:44,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:47:44,970 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:47:44,970 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:47:44,972 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.i [2023-11-19 07:47:48,170 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:47:48,539 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:47:48,540 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.i [2023-11-19 07:47:48,565 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/data/0b40594c1/335ee9e9eef64a4aaa93eb844057d878/FLAG4749c1e33 [2023-11-19 07:47:48,581 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/data/0b40594c1/335ee9e9eef64a4aaa93eb844057d878 [2023-11-19 07:47:48,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:47:48,586 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:47:48,587 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:47:48,588 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:47:48,594 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:47:48,594 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:48" (1/1) ... [2023-11-19 07:47:48,596 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59374c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:48, skipping insertion in model container [2023-11-19 07:47:48,596 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:48" (1/1) ... [2023-11-19 07:47:48,667 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:47:49,221 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_b762fb5e-77b5-4da2-988e-9efe10bf1935/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.i[33021,33034] [2023-11-19 07:47:49,425 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_b762fb5e-77b5-4da2-988e-9efe10bf1935/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.i[44124,44137] [2023-11-19 07:47:49,426 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_b762fb5e-77b5-4da2-988e-9efe10bf1935/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.i[44245,44258] [2023-11-19 07:47:49,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:47:49,449 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:47:49,480 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_b762fb5e-77b5-4da2-988e-9efe10bf1935/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.i[33021,33034] [2023-11-19 07:47:49,584 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_b762fb5e-77b5-4da2-988e-9efe10bf1935/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.i[44124,44137] [2023-11-19 07:47:49,595 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_b762fb5e-77b5-4da2-988e-9efe10bf1935/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.i[44245,44258] [2023-11-19 07:47:49,600 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:47:49,654 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:47:49,662 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:47:49,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49 WrapperNode [2023-11-19 07:47:49,663 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:47:49,664 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:47:49,664 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:47:49,664 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:47:49,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:49,715 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:49,863 INFO L138 Inliner]: procedures = 176, calls = 277, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1329 [2023-11-19 07:47:49,869 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:47:49,870 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:47:49,871 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:47:49,871 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:47:49,881 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:49,882 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:49,898 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:49,898 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:49,987 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:50,013 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:50,025 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:50,040 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:50,060 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:47:50,061 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:47:50,062 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:47:50,062 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:47:50,063 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (1/1) ... [2023-11-19 07:47:50,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:47:50,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:50,103 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:47:50,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:47:50,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:47:50,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:47:50,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-19 07:47:50,168 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-19 07:47:50,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:47:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:47:50,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 07:47:50,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:47:50,171 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-19 07:47:50,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:47:50,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:47:50,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:47:50,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:47:50,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:47:50,458 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:47:50,460 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:47:52,220 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:47:52,235 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:47:52,243 INFO L302 CfgBuilder]: Removed 63 assume(true) statements. [2023-11-19 07:47:52,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:52 BoogieIcfgContainer [2023-11-19 07:47:52,253 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:47:52,255 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:47:52,256 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:47:52,259 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:47:52,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:47:48" (1/3) ... [2023-11-19 07:47:52,262 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74975a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:52, skipping insertion in model container [2023-11-19 07:47:52,262 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:49" (2/3) ... [2023-11-19 07:47:52,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74975a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:52, skipping insertion in model container [2023-11-19 07:47:52,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:52" (3/3) ... [2023-11-19 07:47:52,266 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test7-1.i [2023-11-19 07:47:52,287 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:47:52,287 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 07:47:52,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:47:52,405 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;@608e7cc5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:47:52,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 07:47:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 354 states, 347 states have (on average 1.7002881844380404) internal successors, (590), 349 states have internal predecessors, (590), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:47:52,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 07:47:52,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:52,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:52,423 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:52,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:52,431 INFO L85 PathProgramCache]: Analyzing trace with hash -319855992, now seen corresponding path program 1 times [2023-11-19 07:47:52,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:52,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465700116] [2023-11-19 07:47:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:52,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:52,615 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 07:47:52,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:52,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465700116] [2023-11-19 07:47:52,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465700116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:52,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:52,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:52,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403147683] [2023-11-19 07:47:52,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:52,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:47:52,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:52,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:47:52,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:47:52,658 INFO L87 Difference]: Start difference. First operand has 354 states, 347 states have (on average 1.7002881844380404) internal successors, (590), 349 states have internal predecessors, (590), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:52,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:52,726 INFO L93 Difference]: Finished difference Result 705 states and 1189 transitions. [2023-11-19 07:47:52,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:47:52,728 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 07:47:52,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:52,742 INFO L225 Difference]: With dead ends: 705 [2023-11-19 07:47:52,742 INFO L226 Difference]: Without dead ends: 349 [2023-11-19 07:47:52,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:47:52,751 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:52,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:47:52,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-11-19 07:47:52,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2023-11-19 07:47:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 343 states have (on average 1.5043731778425655) internal successors, (516), 344 states have internal predecessors, (516), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:47:52,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 522 transitions. [2023-11-19 07:47:52,820 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 522 transitions. Word has length 8 [2023-11-19 07:47:52,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:52,821 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 522 transitions. [2023-11-19 07:47:52,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 522 transitions. [2023-11-19 07:47:52,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 07:47:52,822 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:52,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:52,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:47:52,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:52,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:52,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1048299246, now seen corresponding path program 1 times [2023-11-19 07:47:52,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:52,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428590321] [2023-11-19 07:47:52,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:52,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:53,075 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 07:47:53,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:53,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428590321] [2023-11-19 07:47:53,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428590321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:53,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:53,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:47:53,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608776987] [2023-11-19 07:47:53,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:53,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:47:53,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:53,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:47:53,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:47:53,079 INFO L87 Difference]: Start difference. First operand 349 states and 522 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:53,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:53,521 INFO L93 Difference]: Finished difference Result 792 states and 1199 transitions. [2023-11-19 07:47:53,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:47:53,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 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 07:47:53,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:53,527 INFO L225 Difference]: With dead ends: 792 [2023-11-19 07:47:53,527 INFO L226 Difference]: Without dead ends: 622 [2023-11-19 07:47:53,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:47:53,530 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 414 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:53,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 1437 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:47:53,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2023-11-19 07:47:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 351. [2023-11-19 07:47:53,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 345 states have (on average 1.5014492753623188) internal successors, (518), 346 states have internal predecessors, (518), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:47:53,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 524 transitions. [2023-11-19 07:47:53,566 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 524 transitions. Word has length 10 [2023-11-19 07:47:53,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:53,566 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 524 transitions. [2023-11-19 07:47:53,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 524 transitions. [2023-11-19 07:47:53,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-19 07:47:53,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:53,571 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:47:53,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:47:53,572 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:53,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:53,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1701374014, now seen corresponding path program 1 times [2023-11-19 07:47:53,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:53,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398386220] [2023-11-19 07:47:53,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:53,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:53,677 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:53,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96594449] [2023-11-19 07:47:53,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:53,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:53,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:53,681 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:53,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:47:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:54,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:47:54,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:54,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:54,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:54,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398386220] [2023-11-19 07:47:54,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:54,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96594449] [2023-11-19 07:47:54,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96594449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:54,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:54,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:47:54,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648941637] [2023-11-19 07:47:54,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:54,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:54,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:54,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:54,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:54,090 INFO L87 Difference]: Start difference. First operand 351 states and 524 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:54,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:54,180 INFO L93 Difference]: Finished difference Result 719 states and 1075 transitions. [2023-11-19 07:47:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:54,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2023-11-19 07:47:54,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:54,185 INFO L225 Difference]: With dead ends: 719 [2023-11-19 07:47:54,185 INFO L226 Difference]: Without dead ends: 372 [2023-11-19 07:47:54,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 84 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 07:47:54,189 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 9 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 989 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 07:47:54,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 989 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:47:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-11-19 07:47:54,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 371. [2023-11-19 07:47:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 365 states have (on average 1.473972602739726) internal successors, (538), 366 states have internal predecessors, (538), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:47:54,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 544 transitions. [2023-11-19 07:47:54,223 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 544 transitions. Word has length 86 [2023-11-19 07:47:54,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:54,224 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 544 transitions. [2023-11-19 07:47:54,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:54,224 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 544 transitions. [2023-11-19 07:47:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-19 07:47:54,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:54,234 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:47:54,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:54,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:54,454 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:54,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:54,455 INFO L85 PathProgramCache]: Analyzing trace with hash -15194176, now seen corresponding path program 1 times [2023-11-19 07:47:54,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:54,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320194356] [2023-11-19 07:47:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:54,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:54,560 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:54,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786240392] [2023-11-19 07:47:54,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:54,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:54,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:54,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:54,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:47:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:54,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:47:54,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:54,935 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:54,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:54,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320194356] [2023-11-19 07:47:54,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:54,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786240392] [2023-11-19 07:47:54,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786240392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:54,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:54,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:47:54,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692018928] [2023-11-19 07:47:54,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:54,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:47:54,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:54,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:47:54,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:47:54,939 INFO L87 Difference]: Start difference. First operand 371 states and 544 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:55,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:55,032 INFO L93 Difference]: Finished difference Result 725 states and 1071 transitions. [2023-11-19 07:47:55,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:47:55,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2023-11-19 07:47:55,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:55,035 INFO L225 Difference]: With dead ends: 725 [2023-11-19 07:47:55,036 INFO L226 Difference]: Without dead ends: 358 [2023-11-19 07:47:55,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 07:47:55,038 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 165 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1331 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 07:47:55,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1331 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:47:55,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-11-19 07:47:55,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 357. [2023-11-19 07:47:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 351 states have (on average 1.4729344729344729) internal successors, (517), 352 states have internal predecessors, (517), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:47:55,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 523 transitions. [2023-11-19 07:47:55,052 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 523 transitions. Word has length 86 [2023-11-19 07:47:55,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:55,053 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 523 transitions. [2023-11-19 07:47:55,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:55,053 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 523 transitions. [2023-11-19 07:47:55,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-19 07:47:55,055 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:55,055 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:47:55,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:55,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:55,270 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:55,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:55,270 INFO L85 PathProgramCache]: Analyzing trace with hash -676871986, now seen corresponding path program 1 times [2023-11-19 07:47:55,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:55,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175754443] [2023-11-19 07:47:55,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:55,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:55,347 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:55,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062117007] [2023-11-19 07:47:55,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:55,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:55,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:55,352 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:55,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:47:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:55,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:47:55,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:55,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:55,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:55,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175754443] [2023-11-19 07:47:55,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:55,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062117007] [2023-11-19 07:47:55,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062117007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:55,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:55,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:47:55,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579584603] [2023-11-19 07:47:55,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:55,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:55,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:55,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:55,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:55,974 INFO L87 Difference]: Start difference. First operand 357 states and 523 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:56,116 INFO L93 Difference]: Finished difference Result 975 states and 1444 transitions. [2023-11-19 07:47:56,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:56,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2023-11-19 07:47:56,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:56,126 INFO L225 Difference]: With dead ends: 975 [2023-11-19 07:47:56,126 INFO L226 Difference]: Without dead ends: 622 [2023-11-19 07:47:56,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 84 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 07:47:56,128 INFO L413 NwaCegarLoop]: 685 mSDtfsCounter, 344 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:56,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 1168 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:47:56,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2023-11-19 07:47:56,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 615. [2023-11-19 07:47:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 609 states have (on average 1.4975369458128078) internal successors, (912), 610 states have internal predecessors, (912), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:47:56,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 918 transitions. [2023-11-19 07:47:56,155 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 918 transitions. Word has length 86 [2023-11-19 07:47:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:56,156 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 918 transitions. [2023-11-19 07:47:56,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 918 transitions. [2023-11-19 07:47:56,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-19 07:47:56,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:56,160 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:47:56,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:56,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:56,380 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:56,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:56,381 INFO L85 PathProgramCache]: Analyzing trace with hash 387888310, now seen corresponding path program 1 times [2023-11-19 07:47:56,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:56,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213294442] [2023-11-19 07:47:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:56,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:56,445 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:56,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605415697] [2023-11-19 07:47:56,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:56,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:56,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:56,447 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:56,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:47:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:56,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:47:56,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:56,866 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 11 treesize of output 7 [2023-11-19 07:47:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:47:56,881 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:56,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:56,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213294442] [2023-11-19 07:47:56,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:56,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605415697] [2023-11-19 07:47:56,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605415697] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:56,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:56,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:47:56,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240221576] [2023-11-19 07:47:56,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:56,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:47:56,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:56,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:47:56,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:47:56,885 INFO L87 Difference]: Start difference. First operand 615 states and 918 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:47:57,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:57,229 INFO L93 Difference]: Finished difference Result 786 states and 1176 transitions. [2023-11-19 07:47:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:47:57,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 101 [2023-11-19 07:47:57,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:57,236 INFO L225 Difference]: With dead ends: 786 [2023-11-19 07:47:57,236 INFO L226 Difference]: Without dead ends: 782 [2023-11-19 07:47:57,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 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 07:47:57,237 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 403 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:57,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 1437 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:47:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2023-11-19 07:47:57,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 617. [2023-11-19 07:47:57,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 611 states have (on average 1.4959083469721768) internal successors, (914), 612 states have internal predecessors, (914), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:47:57,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 920 transitions. [2023-11-19 07:47:57,265 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 920 transitions. Word has length 101 [2023-11-19 07:47:57,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:57,266 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 920 transitions. [2023-11-19 07:47:57,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:47:57,267 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 920 transitions. [2023-11-19 07:47:57,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-19 07:47:57,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:57,270 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:47:57,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:57,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:57,492 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:57,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:57,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1311439486, now seen corresponding path program 1 times [2023-11-19 07:47:57,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:57,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318764398] [2023-11-19 07:47:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:57,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:57,573 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:57,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087988787] [2023-11-19 07:47:57,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:57,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:57,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:57,575 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:57,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:47:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:58,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:47:58,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:47:58,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:58,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:58,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318764398] [2023-11-19 07:47:58,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:58,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087988787] [2023-11-19 07:47:58,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087988787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:58,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:58,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:47:58,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933964914] [2023-11-19 07:47:58,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:58,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:58,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:58,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:58,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:58,027 INFO L87 Difference]: Start difference. First operand 617 states and 920 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:47:58,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:58,113 INFO L93 Difference]: Finished difference Result 969 states and 1455 transitions. [2023-11-19 07:47:58,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:58,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 155 [2023-11-19 07:47:58,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:58,118 INFO L225 Difference]: With dead ends: 969 [2023-11-19 07:47:58,119 INFO L226 Difference]: Without dead ends: 659 [2023-11-19 07:47:58,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 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 07:47:58,121 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 9 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 975 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 07:47:58,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 975 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:47:58,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2023-11-19 07:47:58,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 657. [2023-11-19 07:47:58,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 651 states have (on average 1.4654377880184333) internal successors, (954), 652 states have internal predecessors, (954), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:47:58,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 960 transitions. [2023-11-19 07:47:58,146 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 960 transitions. Word has length 155 [2023-11-19 07:47:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:58,146 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 960 transitions. [2023-11-19 07:47:58,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:47:58,147 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 960 transitions. [2023-11-19 07:47:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-19 07:47:58,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:58,150 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:47:58,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:58,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:58,372 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:58,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:58,373 INFO L85 PathProgramCache]: Analyzing trace with hash -917072700, now seen corresponding path program 1 times [2023-11-19 07:47:58,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:58,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147005890] [2023-11-19 07:47:58,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:58,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:58,438 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:58,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116346081] [2023-11-19 07:47:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:58,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:58,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:58,441 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:58,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:47:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:58,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:47:58,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:47:58,880 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:58,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:58,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147005890] [2023-11-19 07:47:58,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:58,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116346081] [2023-11-19 07:47:58,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116346081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:58,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:58,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:47:58,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702228686] [2023-11-19 07:47:58,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:58,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:47:58,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:58,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:47:58,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:47:58,885 INFO L87 Difference]: Start difference. First operand 657 states and 960 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:47:59,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:59,018 INFO L93 Difference]: Finished difference Result 981 states and 1447 transitions. [2023-11-19 07:47:59,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:47:59,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 155 [2023-11-19 07:47:59,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:59,024 INFO L225 Difference]: With dead ends: 981 [2023-11-19 07:47:59,024 INFO L226 Difference]: Without dead ends: 631 [2023-11-19 07:47:59,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 152 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 07:47:59,026 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 165 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1310 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 07:47:59,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1310 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:47:59,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2023-11-19 07:47:59,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2023-11-19 07:47:59,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 623 states have (on average 1.463884430176565) internal successors, (912), 624 states have internal predecessors, (912), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:47:59,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 918 transitions. [2023-11-19 07:47:59,056 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 918 transitions. Word has length 155 [2023-11-19 07:47:59,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:59,056 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 918 transitions. [2023-11-19 07:47:59,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:47:59,057 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 918 transitions. [2023-11-19 07:47:59,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-19 07:47:59,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:59,060 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:47:59,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-19 07:47:59,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:59,283 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:59,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:59,284 INFO L85 PathProgramCache]: Analyzing trace with hash 834573174, now seen corresponding path program 1 times [2023-11-19 07:47:59,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:59,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650175401] [2023-11-19 07:47:59,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:59,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:59,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:59,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82905146] [2023-11-19 07:47:59,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:59,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:59,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:59,364 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:59,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:47:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:59,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:47:59,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:48:00,020 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:00,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:00,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650175401] [2023-11-19 07:48:00,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:00,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82905146] [2023-11-19 07:48:00,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82905146] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:00,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:00,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:48:00,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404689877] [2023-11-19 07:48:00,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:00,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:48:00,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:00,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:48:00,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:48:00,024 INFO L87 Difference]: Start difference. First operand 629 states and 918 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:00,362 INFO L93 Difference]: Finished difference Result 1311 states and 1908 transitions. [2023-11-19 07:48:00,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:48:00,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 155 [2023-11-19 07:48:00,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:00,369 INFO L225 Difference]: With dead ends: 1311 [2023-11-19 07:48:00,369 INFO L226 Difference]: Without dead ends: 803 [2023-11-19 07:48:00,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 153 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 07:48:00,371 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 1081 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:00,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1081 Valid, 1056 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:48:00,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2023-11-19 07:48:00,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 796. [2023-11-19 07:48:00,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 790 states have (on average 1.4645569620253165) internal successors, (1157), 791 states have internal predecessors, (1157), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:00,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1163 transitions. [2023-11-19 07:48:00,407 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1163 transitions. Word has length 155 [2023-11-19 07:48:00,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:00,408 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 1163 transitions. [2023-11-19 07:48:00,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:00,408 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1163 transitions. [2023-11-19 07:48:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-19 07:48:00,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:00,411 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:48:00,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:00,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:00,633 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:00,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:00,634 INFO L85 PathProgramCache]: Analyzing trace with hash -237028407, now seen corresponding path program 1 times [2023-11-19 07:48:00,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:00,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668617404] [2023-11-19 07:48:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:00,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:00,734 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:00,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053313146] [2023-11-19 07:48:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:00,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:00,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:00,736 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:00,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:48:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:01,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 07:48:01,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:01,247 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 11 treesize of output 7 [2023-11-19 07:48:01,298 INFO L349 Elim1Store]: treesize reduction 57, result has 23.0 percent of original size [2023-11-19 07:48:01,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2023-11-19 07:48:02,199 INFO L349 Elim1Store]: treesize reduction 12, result has 78.2 percent of original size [2023-11-19 07:48:02,200 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 62 treesize of output 78 [2023-11-19 07:48:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:48:02,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:02,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:02,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668617404] [2023-11-19 07:48:02,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:02,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053313146] [2023-11-19 07:48:02,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053313146] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:02,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:02,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-19 07:48:02,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846134324] [2023-11-19 07:48:02,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:02,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:48:02,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:02,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:48:02,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:48:02,879 INFO L87 Difference]: Start difference. First operand 796 states and 1163 transitions. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:06,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:06,021 INFO L93 Difference]: Finished difference Result 1712 states and 2493 transitions. [2023-11-19 07:48:06,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:48:06,022 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 165 [2023-11-19 07:48:06,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:06,028 INFO L225 Difference]: With dead ends: 1712 [2023-11-19 07:48:06,028 INFO L226 Difference]: Without dead ends: 998 [2023-11-19 07:48:06,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:48:06,031 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 650 mSDsluCounter, 3284 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 3780 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:06,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 3780 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-19 07:48:06,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2023-11-19 07:48:06,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 828. [2023-11-19 07:48:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 822 states have (on average 1.4525547445255473) internal successors, (1194), 823 states have internal predecessors, (1194), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:06,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1200 transitions. [2023-11-19 07:48:06,075 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1200 transitions. Word has length 165 [2023-11-19 07:48:06,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:06,076 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 1200 transitions. [2023-11-19 07:48:06,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:06,076 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1200 transitions. [2023-11-19 07:48:06,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-19 07:48:06,079 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:06,080 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:48:06,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:06,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:48:06,296 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:06,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:06,297 INFO L85 PathProgramCache]: Analyzing trace with hash 173581959, now seen corresponding path program 1 times [2023-11-19 07:48:06,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:06,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147675822] [2023-11-19 07:48:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:06,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:06,383 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:06,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743255255] [2023-11-19 07:48:06,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:06,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:06,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:06,385 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:06,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:48:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:06,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:48:06,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:48:06,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:06,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:06,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147675822] [2023-11-19 07:48:06,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:06,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743255255] [2023-11-19 07:48:06,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743255255] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:06,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:06,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:48:06,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956293572] [2023-11-19 07:48:06,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:06,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:48:06,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:06,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:48:06,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:48:06,919 INFO L87 Difference]: Start difference. First operand 828 states and 1200 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:07,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:07,049 INFO L93 Difference]: Finished difference Result 1742 states and 2561 transitions. [2023-11-19 07:48:07,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:48:07,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 165 [2023-11-19 07:48:07,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:07,056 INFO L225 Difference]: With dead ends: 1742 [2023-11-19 07:48:07,057 INFO L226 Difference]: Without dead ends: 1016 [2023-11-19 07:48:07,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 161 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 07:48:07,059 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 148 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:07,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 1463 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:48:07,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2023-11-19 07:48:07,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 851. [2023-11-19 07:48:07,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 845 states have (on average 1.4390532544378698) internal successors, (1216), 846 states have internal predecessors, (1216), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:07,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1222 transitions. [2023-11-19 07:48:07,095 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1222 transitions. Word has length 165 [2023-11-19 07:48:07,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:07,096 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 1222 transitions. [2023-11-19 07:48:07,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:07,096 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1222 transitions. [2023-11-19 07:48:07,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-19 07:48:07,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:07,099 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:48:07,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:07,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:48:07,320 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:07,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:07,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1500655856, now seen corresponding path program 1 times [2023-11-19 07:48:07,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:07,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297238854] [2023-11-19 07:48:07,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:07,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:07,388 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:07,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514740911] [2023-11-19 07:48:07,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:07,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:07,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:07,390 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:07,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:48:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:07,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 07:48:07,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:07,935 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 11 treesize of output 7 [2023-11-19 07:48:08,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:48:08,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 23 [2023-11-19 07:48:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:48:08,363 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:08,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:08,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297238854] [2023-11-19 07:48:08,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:08,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514740911] [2023-11-19 07:48:08,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514740911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:08,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:08,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-19 07:48:08,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245527963] [2023-11-19 07:48:08,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:08,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:48:08,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:08,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:48:08,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:48:08,366 INFO L87 Difference]: Start difference. First operand 851 states and 1222 transitions. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:10,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 07:48:11,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:11,418 INFO L93 Difference]: Finished difference Result 1542 states and 2223 transitions. [2023-11-19 07:48:11,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:48:11,418 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 166 [2023-11-19 07:48:11,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:11,425 INFO L225 Difference]: With dead ends: 1542 [2023-11-19 07:48:11,425 INFO L226 Difference]: Without dead ends: 1053 [2023-11-19 07:48:11,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:48:11,427 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 456 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 2127 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:11,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 2127 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-19 07:48:11,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2023-11-19 07:48:11,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 886. [2023-11-19 07:48:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 880 states have (on average 1.4272727272727272) internal successors, (1256), 881 states have internal predecessors, (1256), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:11,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1262 transitions. [2023-11-19 07:48:11,465 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1262 transitions. Word has length 166 [2023-11-19 07:48:11,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:11,465 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1262 transitions. [2023-11-19 07:48:11,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:11,466 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1262 transitions. [2023-11-19 07:48:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-19 07:48:11,469 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:11,469 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:48:11,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:11,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:48:11,688 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:11,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:11,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1073123308, now seen corresponding path program 1 times [2023-11-19 07:48:11,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:11,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828108007] [2023-11-19 07:48:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:11,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:11,768 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:11,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43758228] [2023-11-19 07:48:11,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:11,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:11,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:11,770 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:11,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:48:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:12,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:48:12,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:48:12,298 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:12,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:12,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828108007] [2023-11-19 07:48:12,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:12,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43758228] [2023-11-19 07:48:12,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43758228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:12,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:12,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:48:12,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125422372] [2023-11-19 07:48:12,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:12,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:48:12,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:12,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:48:12,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:48:12,302 INFO L87 Difference]: Start difference. First operand 886 states and 1262 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:12,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:12,426 INFO L93 Difference]: Finished difference Result 1709 states and 2490 transitions. [2023-11-19 07:48:12,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:48:12,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 166 [2023-11-19 07:48:12,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:12,435 INFO L225 Difference]: With dead ends: 1709 [2023-11-19 07:48:12,435 INFO L226 Difference]: Without dead ends: 1217 [2023-11-19 07:48:12,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 162 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 07:48:12,437 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 142 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:12,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1463 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:48:12,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2023-11-19 07:48:12,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 955. [2023-11-19 07:48:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 949 states have (on average 1.399367755532139) internal successors, (1328), 950 states have internal predecessors, (1328), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:12,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1334 transitions. [2023-11-19 07:48:12,475 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1334 transitions. Word has length 166 [2023-11-19 07:48:12,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:12,476 INFO L495 AbstractCegarLoop]: Abstraction has 955 states and 1334 transitions. [2023-11-19 07:48:12,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:12,476 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1334 transitions. [2023-11-19 07:48:12,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-19 07:48:12,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:12,479 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:48:12,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:12,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:12,702 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:12,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:12,702 INFO L85 PathProgramCache]: Analyzing trace with hash 2079999024, now seen corresponding path program 1 times [2023-11-19 07:48:12,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:12,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228813483] [2023-11-19 07:48:12,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:12,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:12,765 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:12,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895166618] [2023-11-19 07:48:12,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:12,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:12,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:12,767 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:12,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:48:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:13,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-19 07:48:13,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:13,327 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 11 treesize of output 7 [2023-11-19 07:48:13,415 INFO L349 Elim1Store]: treesize reduction 57, result has 23.0 percent of original size [2023-11-19 07:48:13,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2023-11-19 07:48:13,422 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-19 07:48:13,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2023-11-19 07:48:13,437 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 11 treesize of output 7 [2023-11-19 07:48:13,720 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:48:13,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 23 [2023-11-19 07:48:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:48:13,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:14,551 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:48:14,551 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 39 treesize of output 1 [2023-11-19 07:48:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:48:14,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:14,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228813483] [2023-11-19 07:48:14,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:14,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895166618] [2023-11-19 07:48:14,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895166618] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:14,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:48:14,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2023-11-19 07:48:14,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575889391] [2023-11-19 07:48:14,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:14,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:48:14,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:14,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:48:14,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:48:14,573 INFO L87 Difference]: Start difference. First operand 955 states and 1334 transitions. Second operand has 11 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:16,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-19 07:48:19,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 07:48:22,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 07:48:25,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 07:48:27,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 07:48:30,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:48:33,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:48:35,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:48:37,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:48:38,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:38,171 INFO L93 Difference]: Finished difference Result 1979 states and 2761 transitions. [2023-11-19 07:48:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:48:38,172 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 167 [2023-11-19 07:48:38,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:38,180 INFO L225 Difference]: With dead ends: 1979 [2023-11-19 07:48:38,180 INFO L226 Difference]: Without dead ends: 1421 [2023-11-19 07:48:38,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2023-11-19 07:48:38,183 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 731 mSDsluCounter, 3549 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 42 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 4054 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:38,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [731 Valid, 4054 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1727 Invalid, 8 Unknown, 0 Unchecked, 22.4s Time] [2023-11-19 07:48:38,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2023-11-19 07:48:38,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 973. [2023-11-19 07:48:38,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 967 states have (on average 1.3981385729058946) internal successors, (1352), 968 states have internal predecessors, (1352), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:38,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1358 transitions. [2023-11-19 07:48:38,265 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1358 transitions. Word has length 167 [2023-11-19 07:48:38,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:38,265 INFO L495 AbstractCegarLoop]: Abstraction has 973 states and 1358 transitions. [2023-11-19 07:48:38,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:38,266 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1358 transitions. [2023-11-19 07:48:38,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-19 07:48:38,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:38,270 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:48:38,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:38,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:38,487 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:38,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:38,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1445304603, now seen corresponding path program 1 times [2023-11-19 07:48:38,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:38,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782667573] [2023-11-19 07:48:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:38,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:38,549 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:38,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479991351] [2023-11-19 07:48:38,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:38,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:38,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:38,551 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:38,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:48:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:39,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:48:39,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:48:39,266 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:39,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:39,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782667573] [2023-11-19 07:48:39,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:39,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479991351] [2023-11-19 07:48:39,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479991351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:39,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:39,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:48:39,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676789930] [2023-11-19 07:48:39,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:39,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:48:39,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:39,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:48:39,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:48:39,269 INFO L87 Difference]: Start difference. First operand 973 states and 1358 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:39,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:39,911 INFO L93 Difference]: Finished difference Result 1606 states and 2258 transitions. [2023-11-19 07:48:39,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:48:39,912 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 168 [2023-11-19 07:48:39,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:39,919 INFO L225 Difference]: With dead ends: 1606 [2023-11-19 07:48:39,919 INFO L226 Difference]: Without dead ends: 1030 [2023-11-19 07:48:39,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:48:39,921 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 17 mSDsluCounter, 1909 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2405 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:39,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2405 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:48:39,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2023-11-19 07:48:39,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 1009. [2023-11-19 07:48:39,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1003 states have (on average 1.3928215353938185) internal successors, (1397), 1004 states have internal predecessors, (1397), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:39,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1403 transitions. [2023-11-19 07:48:39,977 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1403 transitions. Word has length 168 [2023-11-19 07:48:39,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:39,977 INFO L495 AbstractCegarLoop]: Abstraction has 1009 states and 1403 transitions. [2023-11-19 07:48:39,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:39,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1403 transitions. [2023-11-19 07:48:39,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-19 07:48:39,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:39,981 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:48:40,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-19 07:48:40,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:48:40,196 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:40,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:40,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1753649867, now seen corresponding path program 1 times [2023-11-19 07:48:40,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:40,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276048626] [2023-11-19 07:48:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:40,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:40,256 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:40,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437528647] [2023-11-19 07:48:40,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:40,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:40,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:40,258 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:40,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b762fb5e-77b5-4da2-988e-9efe10bf1935/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 07:48:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:40,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:48:40,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:48:40,928 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:40,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:40,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276048626] [2023-11-19 07:48:40,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:40,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437528647] [2023-11-19 07:48:40,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437528647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:40,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:40,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:48:40,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778925924] [2023-11-19 07:48:40,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:40,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:48:40,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:40,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:48:40,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:48:40,933 INFO L87 Difference]: Start difference. First operand 1009 states and 1403 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:41,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:41,154 INFO L93 Difference]: Finished difference Result 1927 states and 2689 transitions. [2023-11-19 07:48:41,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:48:41,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 168 [2023-11-19 07:48:41,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:41,161 INFO L225 Difference]: With dead ends: 1927 [2023-11-19 07:48:41,161 INFO L226 Difference]: Without dead ends: 1032 [2023-11-19 07:48:41,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 165 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 07:48:41,164 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 15 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1334 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:41,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1334 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:48:41,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2023-11-19 07:48:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 1020. [2023-11-19 07:48:41,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1014 states have (on average 1.3895463510848127) internal successors, (1409), 1015 states have internal predecessors, (1409), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1415 transitions. [2023-11-19 07:48:41,218 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1415 transitions. Word has length 168 [2023-11-19 07:48:41,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:41,218 INFO L495 AbstractCegarLoop]: Abstraction has 1020 states and 1415 transitions. [2023-11-19 07:48:41,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:41,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1415 transitions. [2023-11-19 07:48:41,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-19 07:48:41,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:41,222 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]