./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/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_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/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_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/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 2f1aaf5276e100f83cf10565e66c3b5d8c0baa3bbd1a1424b76fbee71241f226 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:00:36,222 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:00:36,324 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:00:36,330 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:00:36,331 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:00:36,358 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:00:36,359 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:00:36,359 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:00:36,360 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:00:36,361 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:00:36,362 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:00:36,362 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:00:36,363 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:00:36,364 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:00:36,364 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:00:36,365 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:00:36,365 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:00:36,366 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:00:36,367 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:00:36,367 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:00:36,368 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:00:36,369 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:00:36,369 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:00:36,370 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:00:36,371 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:00:36,371 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:00:36,372 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:00:36,372 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:00:36,373 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:36,373 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:00:36,374 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:00:36,374 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:00:36,375 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:00:36,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:00:36,376 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:00:36,376 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:00:36,376 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:00:36,377 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:00:36,377 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:00:36,377 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_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f1aaf5276e100f83cf10565e66c3b5d8c0baa3bbd1a1424b76fbee71241f226 [2023-11-19 08:00:36,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:00:36,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:00:36,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:00:36,703 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:00:36,703 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:00:36,705 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-1.i [2023-11-19 08:00:39,872 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:00:40,292 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:00:40,294 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-1.i [2023-11-19 08:00:40,320 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/data/c85704725/1a272f1d81794ab082c61161f79a297b/FLAGfa54b8335 [2023-11-19 08:00:40,339 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/data/c85704725/1a272f1d81794ab082c61161f79a297b [2023-11-19 08:00:40,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:00:40,350 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:00:40,354 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:40,354 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:00:40,359 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:00:40,360 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:40,361 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@377a5dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40, skipping insertion in model container [2023-11-19 08:00:40,362 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:40,444 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:00:40,963 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_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-1.i[33021,33034] [2023-11-19 08:00:41,102 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_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-1.i[44590,44603] [2023-11-19 08:00:41,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:41,137 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:00:41,179 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_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-1.i[33021,33034] [2023-11-19 08:00:41,272 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_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-1.i[44590,44603] [2023-11-19 08:00:41,295 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:41,352 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:00:41,361 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:00:41,361 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:41 WrapperNode [2023-11-19 08:00:41,362 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:41,363 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:41,363 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:00:41,363 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:00:41,372 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:41" (1/1) ... [2023-11-19 08:00:41,420 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:41" (1/1) ... [2023-11-19 08:00:41,524 INFO L138 Inliner]: procedures = 177, calls = 285, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1359 [2023-11-19 08:00:41,524 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:41,525 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:00:41,525 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:00:41,526 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:00:41,540 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:41" (1/1) ... [2023-11-19 08:00:41,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:41" (1/1) ... [2023-11-19 08:00:41,555 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:41" (1/1) ... [2023-11-19 08:00:41,555 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:41" (1/1) ... [2023-11-19 08:00:41,694 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:41" (1/1) ... [2023-11-19 08:00:41,732 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:41" (1/1) ... [2023-11-19 08:00:41,740 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:41" (1/1) ... [2023-11-19 08:00:41,756 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:41" (1/1) ... [2023-11-19 08:00:41,783 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:00:41,784 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:00:41,785 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:00:41,785 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:00:41,786 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:41" (1/1) ... [2023-11-19 08:00:41,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:41,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:41,826 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:00:41,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:00:41,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:00:41,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 08:00:41,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 08:00:41,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:00:41,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-19 08:00:41,877 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-19 08:00:41,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 08:00:41,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:00:41,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 08:00:41,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:00:41,879 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-19 08:00:41,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 08:00:41,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:00:41,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:00:41,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:00:41,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:00:42,191 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:00:42,193 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:00:43,752 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:00:43,766 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:00:43,766 INFO L302 CfgBuilder]: Removed 63 assume(true) statements. [2023-11-19 08:00:43,774 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:43 BoogieIcfgContainer [2023-11-19 08:00:43,774 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:00:43,776 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:00:43,777 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:00:43,780 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:00:43,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:00:40" (1/3) ... [2023-11-19 08:00:43,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2590da5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:43, skipping insertion in model container [2023-11-19 08:00:43,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:41" (2/3) ... [2023-11-19 08:00:43,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2590da5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:43, skipping insertion in model container [2023-11-19 08:00:43,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:43" (3/3) ... [2023-11-19 08:00:43,783 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test3-1.i [2023-11-19 08:00:43,803 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:00:43,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 08:00:43,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:00:43,870 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;@1f29b443, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:00:43,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 08:00:43,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 370 states, 357 states have (on average 1.6974789915966386) internal successors, (606), 364 states have internal predecessors, (606), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:00:43,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 08:00:43,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:43,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:43,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:43,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:43,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2000585506, now seen corresponding path program 1 times [2023-11-19 08:00:43,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:43,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167100985] [2023-11-19 08:00:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:43,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:44,115 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 08:00:44,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:44,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167100985] [2023-11-19 08:00:44,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167100985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:44,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:44,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:44,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940909459] [2023-11-19 08:00:44,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:44,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:00:44,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:44,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:00:44,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:00:44,175 INFO L87 Difference]: Start difference. First operand has 370 states, 357 states have (on average 1.6974789915966386) internal successors, (606), 364 states have internal predecessors, (606), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 08:00:44,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:44,276 INFO L93 Difference]: Finished difference Result 738 states and 1247 transitions. [2023-11-19 08:00:44,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:00:44,279 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2023-11-19 08:00:44,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:44,294 INFO L225 Difference]: With dead ends: 738 [2023-11-19 08:00:44,294 INFO L226 Difference]: Without dead ends: 366 [2023-11-19 08:00:44,299 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 08:00:44,303 INFO L413 NwaCegarLoop]: 553 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, 553 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 08:00:44,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:00:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2023-11-19 08:00:44,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 366. [2023-11-19 08:00:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 354 states have (on average 1.5056497175141244) internal successors, (533), 360 states have internal predecessors, (533), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:00:44,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 549 transitions. [2023-11-19 08:00:44,374 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 549 transitions. Word has length 9 [2023-11-19 08:00:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:44,375 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 549 transitions. [2023-11-19 08:00:44,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 08:00:44,375 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 549 transitions. [2023-11-19 08:00:44,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 08:00:44,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:44,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:44,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:00:44,378 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:44,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:44,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2133179329, now seen corresponding path program 1 times [2023-11-19 08:00:44,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:44,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519920184] [2023-11-19 08:00:44,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:44,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:44,646 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 08:00:44,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:44,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519920184] [2023-11-19 08:00:44,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519920184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:44,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:44,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:00:44,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448681363] [2023-11-19 08:00:44,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:44,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:00:44,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:44,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:00:44,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:00:44,650 INFO L87 Difference]: Start difference. First operand 366 states and 549 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:45,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:45,112 INFO L93 Difference]: Finished difference Result 837 states and 1275 transitions. [2023-11-19 08:00:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:00:45,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-19 08:00:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:45,119 INFO L225 Difference]: With dead ends: 837 [2023-11-19 08:00:45,119 INFO L226 Difference]: Without dead ends: 650 [2023-11-19 08:00:45,121 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 08:00:45,123 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 426 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:45,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 1514 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:00:45,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2023-11-19 08:00:45,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 368. [2023-11-19 08:00:45,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 356 states have (on average 1.502808988764045) internal successors, (535), 362 states have internal predecessors, (535), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:00:45,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 551 transitions. [2023-11-19 08:00:45,156 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 551 transitions. Word has length 14 [2023-11-19 08:00:45,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:45,157 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 551 transitions. [2023-11-19 08:00:45,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:45,157 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 551 transitions. [2023-11-19 08:00:45,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 08:00:45,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:45,162 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, 1, 1, 1, 1] [2023-11-19 08:00:45,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:00:45,163 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:45,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:45,163 INFO L85 PathProgramCache]: Analyzing trace with hash -926645611, now seen corresponding path program 1 times [2023-11-19 08:00:45,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:45,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274021126] [2023-11-19 08:00:45,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:45,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:45,241 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:45,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941058986] [2023-11-19 08:00:45,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:45,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:45,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:45,245 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:45,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:00:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:45,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:00:45,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:45,690 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 08:00:45,690 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:45,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:45,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274021126] [2023-11-19 08:00:45,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:45,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941058986] [2023-11-19 08:00:45,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941058986] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:45,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:45,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:00:45,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695939781] [2023-11-19 08:00:45,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:45,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:45,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:45,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:45,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:45,694 INFO L87 Difference]: Start difference. First operand 368 states and 551 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:45,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:45,834 INFO L93 Difference]: Finished difference Result 753 states and 1129 transitions. [2023-11-19 08:00:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:45,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-11-19 08:00:45,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:45,840 INFO L225 Difference]: With dead ends: 753 [2023-11-19 08:00:45,840 INFO L226 Difference]: Without dead ends: 389 [2023-11-19 08:00:45,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 88 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 08:00:45,846 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 9 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1043 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 08:00:45,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1043 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:00:45,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-11-19 08:00:45,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 388. [2023-11-19 08:00:45,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 376 states have (on average 1.476063829787234) internal successors, (555), 382 states have internal predecessors, (555), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:00:45,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 571 transitions. [2023-11-19 08:00:45,887 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 571 transitions. Word has length 90 [2023-11-19 08:00:45,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:45,888 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 571 transitions. [2023-11-19 08:00:45,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:45,888 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 571 transitions. [2023-11-19 08:00:45,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 08:00:45,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:45,900 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, 1, 1, 1, 1] [2023-11-19 08:00:45,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 08:00:46,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 08:00:46,108 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:46,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:46,109 INFO L85 PathProgramCache]: Analyzing trace with hash -434019437, now seen corresponding path program 1 times [2023-11-19 08:00:46,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:46,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865196502] [2023-11-19 08:00:46,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:46,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:46,178 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:46,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863923874] [2023-11-19 08:00:46,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:46,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:46,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:46,181 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:46,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:00:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:46,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:00:46,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:46,603 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 08:00:46,603 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:46,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:46,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865196502] [2023-11-19 08:00:46,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:46,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863923874] [2023-11-19 08:00:46,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863923874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:46,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:46,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:00:46,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115137857] [2023-11-19 08:00:46,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:46,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:00:46,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:46,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:00:46,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:00:46,607 INFO L87 Difference]: Start difference. First operand 388 states and 571 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:46,745 INFO L93 Difference]: Finished difference Result 759 states and 1125 transitions. [2023-11-19 08:00:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:00:46,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-11-19 08:00:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:46,749 INFO L225 Difference]: With dead ends: 759 [2023-11-19 08:00:46,749 INFO L226 Difference]: Without dead ends: 375 [2023-11-19 08:00:46,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 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 08:00:46,752 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 165 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1412 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 08:00:46,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1412 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:00:46,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-11-19 08:00:46,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 374. [2023-11-19 08:00:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 362 states have (on average 1.4751381215469612) internal successors, (534), 368 states have internal predecessors, (534), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:00:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 550 transitions. [2023-11-19 08:00:46,771 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 550 transitions. Word has length 90 [2023-11-19 08:00:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:46,772 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 550 transitions. [2023-11-19 08:00:46,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:46,773 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 550 transitions. [2023-11-19 08:00:46,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 08:00:46,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:46,775 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, 1, 1, 1, 1] [2023-11-19 08:00:46,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:46,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:46,988 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:46,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:46,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1275184545, now seen corresponding path program 1 times [2023-11-19 08:00:46,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:46,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017271450] [2023-11-19 08:00:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:46,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:47,057 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:47,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401009932] [2023-11-19 08:00:47,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:47,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:47,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:47,059 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:47,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:00:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:47,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:00:47,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:47,709 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 08:00:47,709 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:47,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:47,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017271450] [2023-11-19 08:00:47,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:47,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401009932] [2023-11-19 08:00:47,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401009932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:47,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:47,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:00:47,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708174508] [2023-11-19 08:00:47,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:47,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:47,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:47,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:47,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:47,713 INFO L87 Difference]: Start difference. First operand 374 states and 550 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:47,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:47,840 INFO L93 Difference]: Finished difference Result 1020 states and 1520 transitions. [2023-11-19 08:00:47,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:47,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-11-19 08:00:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:47,852 INFO L225 Difference]: With dead ends: 1020 [2023-11-19 08:00:47,852 INFO L226 Difference]: Without dead ends: 650 [2023-11-19 08:00:47,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 88 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 08:00:47,856 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 356 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 1246 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 08:00:47,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 1246 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:00:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2023-11-19 08:00:47,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 632. [2023-11-19 08:00:47,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 620 states have (on average 1.4983870967741935) internal successors, (929), 626 states have internal predecessors, (929), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:00:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 945 transitions. [2023-11-19 08:00:47,926 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 945 transitions. Word has length 90 [2023-11-19 08:00:47,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:47,927 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 945 transitions. [2023-11-19 08:00:47,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:47,927 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 945 transitions. [2023-11-19 08:00:47,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-19 08:00:47,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:47,930 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] [2023-11-19 08:00:47,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:48,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:48,152 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:48,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:48,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1124639735, now seen corresponding path program 1 times [2023-11-19 08:00:48,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:48,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281856933] [2023-11-19 08:00:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:48,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:48,231 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:48,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876352671] [2023-11-19 08:00:48,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:48,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:48,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:48,236 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:48,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:00:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:48,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:00:48,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:48,677 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 15 treesize of output 1 [2023-11-19 08:00:48,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 08:00:48,705 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 08:00:48,705 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:48,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:48,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281856933] [2023-11-19 08:00:48,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:48,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876352671] [2023-11-19 08:00:48,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876352671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:48,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:48,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:00:48,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379970826] [2023-11-19 08:00:48,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:48,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:00:48,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:48,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:00:48,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:00:48,712 INFO L87 Difference]: Start difference. First operand 632 states and 945 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 08:00:49,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:49,098 INFO L93 Difference]: Finished difference Result 832 states and 1245 transitions. [2023-11-19 08:00:49,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:00:49,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 105 [2023-11-19 08:00:49,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:49,105 INFO L225 Difference]: With dead ends: 832 [2023-11-19 08:00:49,105 INFO L226 Difference]: Without dead ends: 811 [2023-11-19 08:00:49,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 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 08:00:49,106 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 244 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:49,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 1543 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:00:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2023-11-19 08:00:49,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 634. [2023-11-19 08:00:49,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 622 states have (on average 1.4967845659163987) internal successors, (931), 628 states have internal predecessors, (931), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:00:49,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 947 transitions. [2023-11-19 08:00:49,135 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 947 transitions. Word has length 105 [2023-11-19 08:00:49,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:49,136 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 947 transitions. [2023-11-19 08:00:49,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 08:00:49,136 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 947 transitions. [2023-11-19 08:00:49,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-19 08:00:49,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:49,139 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 08:00:49,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:49,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 08:00:49,352 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:49,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:49,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1020445694, now seen corresponding path program 1 times [2023-11-19 08:00:49,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:49,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64215008] [2023-11-19 08:00:49,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:49,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:49,423 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:49,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208374563] [2023-11-19 08:00:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:49,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:49,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:49,425 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:49,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:00:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:49,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:00:49,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:49,912 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 08:00:49,912 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:49,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:49,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64215008] [2023-11-19 08:00:49,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:49,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208374563] [2023-11-19 08:00:49,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208374563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:49,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:49,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:00:49,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172811940] [2023-11-19 08:00:49,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:49,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:49,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:49,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:49,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:49,915 INFO L87 Difference]: Start difference. First operand 634 states and 947 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 08:00:50,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:50,020 INFO L93 Difference]: Finished difference Result 1003 states and 1509 transitions. [2023-11-19 08:00:50,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:50,021 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 08:00:50,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:50,026 INFO L225 Difference]: With dead ends: 1003 [2023-11-19 08:00:50,026 INFO L226 Difference]: Without dead ends: 676 [2023-11-19 08:00:50,027 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 08:00:50,028 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 9 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1029 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 08:00:50,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1029 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:00:50,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2023-11-19 08:00:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 674. [2023-11-19 08:00:50,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 662 states have (on average 1.4667673716012084) internal successors, (971), 668 states have internal predecessors, (971), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:00:50,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 987 transitions. [2023-11-19 08:00:50,053 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 987 transitions. Word has length 155 [2023-11-19 08:00:50,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:50,054 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 987 transitions. [2023-11-19 08:00:50,054 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 08:00:50,054 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 987 transitions. [2023-11-19 08:00:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-19 08:00:50,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:50,057 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 08:00:50,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:50,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:50,280 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:50,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:50,281 INFO L85 PathProgramCache]: Analyzing trace with hash -626078908, now seen corresponding path program 1 times [2023-11-19 08:00:50,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:50,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548695553] [2023-11-19 08:00:50,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:50,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:50,343 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:50,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409095682] [2023-11-19 08:00:50,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:50,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:50,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:50,345 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:50,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:00:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:50,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:00:50,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:50,818 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 08:00:50,818 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:50,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:50,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548695553] [2023-11-19 08:00:50,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:50,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409095682] [2023-11-19 08:00:50,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409095682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:50,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:50,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:00:50,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843318528] [2023-11-19 08:00:50,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:50,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:00:50,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:50,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:00:50,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:00:50,821 INFO L87 Difference]: Start difference. First operand 674 states and 987 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 08:00:50,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:50,912 INFO L93 Difference]: Finished difference Result 1015 states and 1501 transitions. [2023-11-19 08:00:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:00:50,913 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 08:00:50,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:50,917 INFO L225 Difference]: With dead ends: 1015 [2023-11-19 08:00:50,917 INFO L226 Difference]: Without dead ends: 648 [2023-11-19 08:00:50,918 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 08:00:50,919 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 165 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1391 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 08:00:50,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1391 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:00:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2023-11-19 08:00:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 646. [2023-11-19 08:00:50,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 634 states have (on average 1.4652996845425867) internal successors, (929), 640 states have internal predecessors, (929), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:00:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 945 transitions. [2023-11-19 08:00:50,944 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 945 transitions. Word has length 155 [2023-11-19 08:00:50,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:50,944 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 945 transitions. [2023-11-19 08:00:50,945 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 08:00:50,945 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 945 transitions. [2023-11-19 08:00:50,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-19 08:00:50,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:50,947 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 08:00:50,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:51,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:51,168 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:51,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:51,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1125566966, now seen corresponding path program 1 times [2023-11-19 08:00:51,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:51,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777710] [2023-11-19 08:00:51,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:51,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:51,233 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:51,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621063430] [2023-11-19 08:00:51,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:51,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:51,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:51,235 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:51,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:00:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:51,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:00:51,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:51,943 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 08:00:51,943 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:51,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:51,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777710] [2023-11-19 08:00:51,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:51,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621063430] [2023-11-19 08:00:51,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621063430] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:51,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:51,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:00:51,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550242930] [2023-11-19 08:00:51,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:51,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:00:51,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:51,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:00:51,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:00:51,946 INFO L87 Difference]: Start difference. First operand 646 states and 945 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 08:00:52,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:52,311 INFO L93 Difference]: Finished difference Result 1370 states and 2008 transitions. [2023-11-19 08:00:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:00:52,311 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 08:00:52,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:52,318 INFO L225 Difference]: With dead ends: 1370 [2023-11-19 08:00:52,318 INFO L226 Difference]: Without dead ends: 845 [2023-11-19 08:00:52,319 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 08:00:52,320 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 1118 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:52,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1123 Valid, 1183 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:00:52,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2023-11-19 08:00:52,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 813. [2023-11-19 08:00:52,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 801 states have (on average 1.4656679151061174) internal successors, (1174), 807 states have internal predecessors, (1174), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:00:52,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1190 transitions. [2023-11-19 08:00:52,364 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1190 transitions. Word has length 155 [2023-11-19 08:00:52,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:52,365 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 1190 transitions. [2023-11-19 08:00:52,365 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 08:00:52,365 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1190 transitions. [2023-11-19 08:00:52,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-19 08:00:52,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:52,369 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 08:00:52,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:52,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:52,584 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:52,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:52,585 INFO L85 PathProgramCache]: Analyzing trace with hash -448441783, now seen corresponding path program 1 times [2023-11-19 08:00:52,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:52,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633088849] [2023-11-19 08:00:52,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:52,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:52,658 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:52,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949993095] [2023-11-19 08:00:52,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:52,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:52,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:52,660 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:52,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:00:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:53,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 08:00:53,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:53,189 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 08:00:53,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:00:53,571 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 08:00:53,751 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 08:00:53,751 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:53,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:53,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633088849] [2023-11-19 08:00:53,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:53,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949993095] [2023-11-19 08:00:53,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949993095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:53,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:53,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-19 08:00:53,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956360717] [2023-11-19 08:00:53,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:53,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 08:00:53,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:53,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 08:00:53,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-19 08:00:53,755 INFO L87 Difference]: Start difference. First operand 813 states and 1190 transitions. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 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 08:00:55,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:55,973 INFO L93 Difference]: Finished difference Result 1521 states and 2218 transitions. [2023-11-19 08:00:55,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 08:00:55,975 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 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 08:00:55,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:55,981 INFO L225 Difference]: With dead ends: 1521 [2023-11-19 08:00:55,981 INFO L226 Difference]: Without dead ends: 1015 [2023-11-19 08:00:55,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 156 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 08:00:55,983 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 450 mSDsluCounter, 3051 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 3575 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:55,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 3575 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 08:00:55,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2023-11-19 08:00:56,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 848. [2023-11-19 08:00:56,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 836 states have (on average 1.4521531100478469) internal successors, (1214), 842 states have internal predecessors, (1214), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:00:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1230 transitions. [2023-11-19 08:00:56,019 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1230 transitions. Word has length 165 [2023-11-19 08:00:56,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:56,020 INFO L495 AbstractCegarLoop]: Abstraction has 848 states and 1230 transitions. [2023-11-19 08:00:56,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 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 08:00:56,020 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1230 transitions. [2023-11-19 08:00:56,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-19 08:00:56,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:56,023 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 08:00:56,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:56,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:00:56,246 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:56,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:56,247 INFO L85 PathProgramCache]: Analyzing trace with hash -875974331, now seen corresponding path program 1 times [2023-11-19 08:00:56,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:56,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870699697] [2023-11-19 08:00:56,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:56,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:56,329 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:56,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144365018] [2023-11-19 08:00:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:56,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:56,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:56,331 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:56,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:00:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:56,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:00:56,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:56,845 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 08:00:56,845 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:56,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:56,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870699697] [2023-11-19 08:00:56,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:56,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144365018] [2023-11-19 08:00:56,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144365018] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:56,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:56,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:00:56,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553678187] [2023-11-19 08:00:56,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:56,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:00:56,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:56,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:00:56,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:00:56,849 INFO L87 Difference]: Start difference. First operand 848 states and 1230 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 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 08:00:56,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:56,991 INFO L93 Difference]: Finished difference Result 1688 states and 2485 transitions. [2023-11-19 08:00:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:00:56,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 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 08:00:56,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:57,000 INFO L225 Difference]: With dead ends: 1688 [2023-11-19 08:00:57,000 INFO L226 Difference]: Without dead ends: 1179 [2023-11-19 08:00:57,001 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 08:00:57,002 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 142 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:57,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1674 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:00:57,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2023-11-19 08:00:57,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 917. [2023-11-19 08:00:57,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 905 states have (on average 1.4209944751381216) internal successors, (1286), 911 states have internal predecessors, (1286), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:00:57,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1302 transitions. [2023-11-19 08:00:57,043 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1302 transitions. Word has length 165 [2023-11-19 08:00:57,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:57,044 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1302 transitions. [2023-11-19 08:00:57,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 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 08:00:57,044 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1302 transitions. [2023-11-19 08:00:57,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-19 08:00:57,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:57,047 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 08:00:57,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-19 08:00:57,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 08:00:57,264 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:57,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:57,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1787514359, now seen corresponding path program 1 times [2023-11-19 08:00:57,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:57,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266988411] [2023-11-19 08:00:57,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:57,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:57,321 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:57,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692393011] [2023-11-19 08:00:57,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:57,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:57,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:57,323 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:57,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:00:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:57,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 08:00:57,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:57,917 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 08:00:57,962 INFO L349 Elim1Store]: treesize reduction 57, result has 23.0 percent of original size [2023-11-19 08:00:57,962 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 08:00:58,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:00:58,278 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 08:00:58,485 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 08:00:58,485 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:58,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:58,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266988411] [2023-11-19 08:00:58,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:58,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692393011] [2023-11-19 08:00:58,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692393011] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:58,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:58,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-19 08:00:58,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950009359] [2023-11-19 08:00:58,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:58,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 08:00:58,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:58,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 08:00:58,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:00:58,489 INFO L87 Difference]: Start difference. First operand 917 states and 1302 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 08:00:59,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:59,966 INFO L93 Difference]: Finished difference Result 1951 states and 2768 transitions. [2023-11-19 08:00:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:00:59,967 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 166 [2023-11-19 08:00:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:59,973 INFO L225 Difference]: With dead ends: 1951 [2023-11-19 08:00:59,973 INFO L226 Difference]: Without dead ends: 1116 [2023-11-19 08:00:59,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:00:59,975 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 656 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 2716 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:59,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 2716 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 08:00:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2023-11-19 08:01:00,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 949. [2023-11-19 08:01:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 937 states have (on average 1.4119530416221986) internal successors, (1323), 943 states have internal predecessors, (1323), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:01:00,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1339 transitions. [2023-11-19 08:01:00,013 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1339 transitions. Word has length 166 [2023-11-19 08:01:00,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:00,013 INFO L495 AbstractCegarLoop]: Abstraction has 949 states and 1339 transitions. [2023-11-19 08:01:00,014 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 08:01:00,014 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1339 transitions. [2023-11-19 08:01:00,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-19 08:01:00,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:00,017 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 08:01:00,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:00,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 08:01:00,240 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:00,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:00,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1631533817, now seen corresponding path program 1 times [2023-11-19 08:01:00,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:00,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261527967] [2023-11-19 08:01:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:00,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:00,312 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:00,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174454014] [2023-11-19 08:01:00,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:00,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:00,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:00,314 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:00,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 08:01:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:00,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:01:00,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:00,858 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 08:01:00,858 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:00,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:00,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261527967] [2023-11-19 08:01:00,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:00,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174454014] [2023-11-19 08:01:00,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174454014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:00,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:00,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:01:00,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516961539] [2023-11-19 08:01:00,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:00,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:01:00,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:00,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:01:00,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:01:00,862 INFO L87 Difference]: Start difference. First operand 949 states and 1339 transitions. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 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 08:01:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:00,997 INFO L93 Difference]: Finished difference Result 1984 states and 2839 transitions. [2023-11-19 08:01:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:01:00,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 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 166 [2023-11-19 08:01:00,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:01,004 INFO L225 Difference]: With dead ends: 1984 [2023-11-19 08:01:01,005 INFO L226 Difference]: Without dead ends: 1137 [2023-11-19 08:01:01,006 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 08:01:01,008 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 145 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:01,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1674 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:01:01,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2023-11-19 08:01:01,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 972. [2023-11-19 08:01:01,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 960 states have (on average 1.4010416666666667) internal successors, (1345), 966 states have internal predecessors, (1345), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:01:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1361 transitions. [2023-11-19 08:01:01,052 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1361 transitions. Word has length 166 [2023-11-19 08:01:01,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:01,053 INFO L495 AbstractCegarLoop]: Abstraction has 972 states and 1361 transitions. [2023-11-19 08:01:01,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 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 08:01:01,053 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1361 transitions. [2023-11-19 08:01:01,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-19 08:01:01,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:01,056 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 08:01:01,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:01,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:01,279 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:01,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:01,280 INFO L85 PathProgramCache]: Analyzing trace with hash -178848336, now seen corresponding path program 1 times [2023-11-19 08:01:01,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:01,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755883653] [2023-11-19 08:01:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:01,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:01,353 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:01,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89992944] [2023-11-19 08:01:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:01,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:01,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:01,355 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:01,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 08:01:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:02,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-19 08:01:02,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:02,189 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 08:01:02,232 INFO L349 Elim1Store]: treesize reduction 57, result has 23.0 percent of original size [2023-11-19 08:01:02,232 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 08:01:03,010 INFO L349 Elim1Store]: treesize reduction 12, result has 78.2 percent of original size [2023-11-19 08:01:03,010 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 08:01:03,411 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 08:01:03,411 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:03,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:03,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755883653] [2023-11-19 08:01:03,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:03,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89992944] [2023-11-19 08:01:03,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89992944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:03,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:03,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-19 08:01:03,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834640068] [2023-11-19 08:01:03,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:03,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:01:03,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:03,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:01:03,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:01:03,415 INFO L87 Difference]: Start difference. First operand 972 states and 1361 transitions. Second operand has 12 states, 12 states have (on average 13.333333333333334) internal successors, (160), 12 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 08:01:05,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:05,829 INFO L93 Difference]: Finished difference Result 2017 states and 2843 transitions. [2023-11-19 08:01:05,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 08:01:05,830 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.333333333333334) internal successors, (160), 12 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 167 [2023-11-19 08:01:05,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:05,836 INFO L225 Difference]: With dead ends: 2017 [2023-11-19 08:01:05,837 INFO L226 Difference]: Without dead ends: 1163 [2023-11-19 08:01:05,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2023-11-19 08:01:05,839 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 734 mSDsluCounter, 3341 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 3860 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:05,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 3860 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 08:01:05,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2023-11-19 08:01:05,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 985. [2023-11-19 08:01:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 973 states have (on average 1.4008221993833505) internal successors, (1363), 979 states have internal predecessors, (1363), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:01:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1379 transitions. [2023-11-19 08:01:05,879 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1379 transitions. Word has length 167 [2023-11-19 08:01:05,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:05,879 INFO L495 AbstractCegarLoop]: Abstraction has 985 states and 1379 transitions. [2023-11-19 08:01:05,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.333333333333334) internal successors, (160), 12 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 08:01:05,880 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1379 transitions. [2023-11-19 08:01:05,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-19 08:01:05,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:05,883 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 08:01:05,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:06,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 08:01:06,096 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:06,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:06,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1892093748, now seen corresponding path program 1 times [2023-11-19 08:01:06,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:06,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709933452] [2023-11-19 08:01:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:06,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:06,158 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:06,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607557025] [2023-11-19 08:01:06,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:06,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:06,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:06,160 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:06,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 08:01:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:06,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 08:01:06,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:06,967 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 08:01:06,967 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:06,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:06,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709933452] [2023-11-19 08:01:06,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:06,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607557025] [2023-11-19 08:01:06,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607557025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:06,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:06,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 08:01:06,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907955043] [2023-11-19 08:01:06,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:06,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:01:06,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:06,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:01:06,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:01:06,973 INFO L87 Difference]: Start difference. First operand 985 states and 1379 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 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 08:01:07,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:07,599 INFO L93 Difference]: Finished difference Result 1875 states and 2636 transitions. [2023-11-19 08:01:07,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:01:07,600 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 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 08:01:07,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:07,606 INFO L225 Difference]: With dead ends: 1875 [2023-11-19 08:01:07,606 INFO L226 Difference]: Without dead ends: 1009 [2023-11-19 08:01:07,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:01:07,609 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 17 mSDsluCounter, 2044 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2567 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 08:01:07,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2567 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 08:01:07,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2023-11-19 08:01:07,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 999. [2023-11-19 08:01:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 987 states have (on average 1.3991894630192503) internal successors, (1381), 993 states have internal predecessors, (1381), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:01:07,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1397 transitions. [2023-11-19 08:01:07,648 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1397 transitions. Word has length 168 [2023-11-19 08:01:07,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:07,649 INFO L495 AbstractCegarLoop]: Abstraction has 999 states and 1397 transitions. [2023-11-19 08:01:07,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 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 08:01:07,649 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1397 transitions. [2023-11-19 08:01:07,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-19 08:01:07,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:07,653 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 08:01:07,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:07,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 08:01:07,869 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:07,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:07,869 INFO L85 PathProgramCache]: Analyzing trace with hash -284501262, now seen corresponding path program 1 times [2023-11-19 08:01:07,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:07,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115933386] [2023-11-19 08:01:07,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:07,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:07,928 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:07,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845361430] [2023-11-19 08:01:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:07,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:07,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:07,930 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:07,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 08:01:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:08,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:01:08,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:08,618 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 08:01:08,618 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:08,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:08,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115933386] [2023-11-19 08:01:08,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:08,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845361430] [2023-11-19 08:01:08,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845361430] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:08,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:08,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 08:01:08,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102878980] [2023-11-19 08:01:08,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:08,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:01:08,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:08,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:01:08,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:01:08,622 INFO L87 Difference]: Start difference. First operand 999 states and 1397 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 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 08:01:09,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:09,075 INFO L93 Difference]: Finished difference Result 1626 states and 2288 transitions. [2023-11-19 08:01:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:01:09,078 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 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 08:01:09,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:09,083 INFO L225 Difference]: With dead ends: 1626 [2023-11-19 08:01:09,083 INFO L226 Difference]: Without dead ends: 1051 [2023-11-19 08:01:09,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:01:09,085 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 30 mSDsluCounter, 1744 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 2263 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:09,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 2263 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:01:09,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2023-11-19 08:01:09,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1029. [2023-11-19 08:01:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1017 states have (on average 1.3903638151425761) internal successors, (1414), 1023 states have internal predecessors, (1414), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:01:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1430 transitions. [2023-11-19 08:01:09,125 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1430 transitions. Word has length 168 [2023-11-19 08:01:09,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:09,125 INFO L495 AbstractCegarLoop]: Abstraction has 1029 states and 1430 transitions. [2023-11-19 08:01:09,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 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 08:01:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1430 transitions. [2023-11-19 08:01:09,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-19 08:01:09,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:09,128 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] [2023-11-19 08:01:09,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:09,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:09,352 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:09,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:09,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2038714701, now seen corresponding path program 1 times [2023-11-19 08:01:09,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:09,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112529538] [2023-11-19 08:01:09,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:09,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:09,411 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:09,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264155685] [2023-11-19 08:01:09,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:09,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:09,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:09,413 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:09,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 08:01:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:10,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 08:01:10,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:10,180 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 08:01:10,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:10,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:10,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112529538] [2023-11-19 08:01:10,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:10,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264155685] [2023-11-19 08:01:10,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264155685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:10,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:10,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 08:01:10,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394663709] [2023-11-19 08:01:10,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:10,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:01:10,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:10,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:01:10,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:01:10,184 INFO L87 Difference]: Start difference. First operand 1029 states and 1430 transitions. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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 08:01:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:10,594 INFO L93 Difference]: Finished difference Result 1943 states and 2707 transitions. [2023-11-19 08:01:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:01:10,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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 169 [2023-11-19 08:01:10,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:10,600 INFO L225 Difference]: With dead ends: 1943 [2023-11-19 08:01:10,600 INFO L226 Difference]: Without dead ends: 1041 [2023-11-19 08:01:10,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:01:10,602 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 10 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2196 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:10,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 2196 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:01:10,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2023-11-19 08:01:10,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1037. [2023-11-19 08:01:10,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1025 states have (on average 1.3892682926829267) internal successors, (1424), 1031 states have internal predecessors, (1424), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:01:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1440 transitions. [2023-11-19 08:01:10,639 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1440 transitions. Word has length 169 [2023-11-19 08:01:10,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:10,639 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 1440 transitions. [2023-11-19 08:01:10,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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 08:01:10,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1440 transitions. [2023-11-19 08:01:10,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-19 08:01:10,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:10,642 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] [2023-11-19 08:01:10,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:10,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 08:01:10,867 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:10,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:10,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1675248203, now seen corresponding path program 1 times [2023-11-19 08:01:10,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:10,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485042644] [2023-11-19 08:01:10,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:10,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:10,972 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:10,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475744417] [2023-11-19 08:01:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:10,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:10,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:10,974 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:10,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-19 08:01:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:11,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 08:01:11,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:11,709 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 08:01:11,709 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:11,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:11,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485042644] [2023-11-19 08:01:11,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:11,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475744417] [2023-11-19 08:01:11,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475744417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:11,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:11,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 08:01:11,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209485530] [2023-11-19 08:01:11,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:11,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:01:11,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:11,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:01:11,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:01:11,712 INFO L87 Difference]: Start difference. First operand 1037 states and 1440 transitions. Second operand has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 1 states have call successors, (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 08:01:12,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:12,038 INFO L93 Difference]: Finished difference Result 1663 states and 2325 transitions. [2023-11-19 08:01:12,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:01:12,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 1 states have call successors, (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 169 [2023-11-19 08:01:12,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:12,046 INFO L225 Difference]: With dead ends: 1663 [2023-11-19 08:01:12,046 INFO L226 Difference]: Without dead ends: 1058 [2023-11-19 08:01:12,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:01:12,048 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 10 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:12,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1816 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:01:12,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2023-11-19 08:01:12,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1052. [2023-11-19 08:01:12,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1040 states have (on average 1.3894230769230769) internal successors, (1445), 1046 states have internal predecessors, (1445), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 08:01:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1461 transitions. [2023-11-19 08:01:12,084 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1461 transitions. Word has length 169 [2023-11-19 08:01:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:12,084 INFO L495 AbstractCegarLoop]: Abstraction has 1052 states and 1461 transitions. [2023-11-19 08:01:12,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 1 states have call successors, (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 08:01:12,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1461 transitions. [2023-11-19 08:01:12,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-19 08:01:12,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:12,087 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] [2023-11-19 08:01:12,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:12,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 08:01:12,300 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:12,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:12,301 INFO L85 PathProgramCache]: Analyzing trace with hash 774351927, now seen corresponding path program 1 times [2023-11-19 08:01:12,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:12,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605072417] [2023-11-19 08:01:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:12,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:12,378 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:12,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774491280] [2023-11-19 08:01:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:12,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:12,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:12,380 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:12,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2154bc74-6c59-4e73-bcb0-d7aaf8d3e0fd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-19 08:01:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:13,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 08:01:13,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:21,863 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 08:01:21,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:21,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:21,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605072417] [2023-11-19 08:01:21,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:21,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774491280] [2023-11-19 08:01:21,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774491280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:21,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:21,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 08:01:21,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535077972] [2023-11-19 08:01:21,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:21,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:01:21,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:21,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:01:21,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:01:21,870 INFO L87 Difference]: Start difference. First operand 1052 states and 1461 transitions. Second operand has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 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 08:01:24,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-19 08:01:26,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-19 08:01:28,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-19 08:01:30,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0]