./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx --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 dbdff9d5cdb7ffcae57151b3d045900600728670d8aad942a459f8d05b6221fb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:14:35,118 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:14:35,215 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:14:35,221 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:14:35,222 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:14:35,248 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:14:35,249 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:14:35,249 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:14:35,250 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:14:35,251 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:14:35,252 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:14:35,252 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:14:35,253 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:14:35,254 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:14:35,254 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:14:35,255 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:14:35,256 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:14:35,256 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:14:35,257 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:14:35,257 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:14:35,258 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:14:35,259 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:14:35,259 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:14:35,260 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:14:35,260 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:14:35,261 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:14:35,261 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:14:35,262 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:14:35,262 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:14:35,262 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:14:35,263 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:14:35,263 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:14:35,264 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:14:35,264 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:14:35,265 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:14:35,265 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:14:35,266 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:14:35,266 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:14:35,267 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:14:35,267 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:14:35,268 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:14:35,268 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:14:35,268 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_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dbdff9d5cdb7ffcae57151b3d045900600728670d8aad942a459f8d05b6221fb [2023-11-21 22:14:35,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:14:35,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:14:35,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:14:35,568 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:14:35,569 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:14:35,570 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c [2023-11-21 22:14:38,822 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:14:39,111 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:14:39,112 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c [2023-11-21 22:14:39,140 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/data/b7b56b452/c936e1620e1f4c5ba7382dca1eaad781/FLAGd73ff3904 [2023-11-21 22:14:39,166 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/data/b7b56b452/c936e1620e1f4c5ba7382dca1eaad781 [2023-11-21 22:14:39,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:14:39,177 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:14:39,181 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:14:39,182 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:14:39,189 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:14:39,190 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:14:39" (1/1) ... [2023-11-21 22:14:39,191 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8f95bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:39, skipping insertion in model container [2023-11-21 22:14:39,191 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:14:39" (1/1) ... [2023-11-21 22:14:39,286 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:14:39,482 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_19ab1ae7-baab-4565-ac3a-8e3e65603534/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c[914,927] [2023-11-21 22:14:39,563 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_19ab1ae7-baab-4565-ac3a-8e3e65603534/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c[7115,7128] [2023-11-21 22:14:39,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:14:39,706 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:14:39,717 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_19ab1ae7-baab-4565-ac3a-8e3e65603534/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c[914,927] [2023-11-21 22:14:39,767 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_19ab1ae7-baab-4565-ac3a-8e3e65603534/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c[7115,7128] [2023-11-21 22:14:39,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:14:39,893 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:14:39,894 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:39 WrapperNode [2023-11-21 22:14:39,894 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:14:39,895 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:14:39,895 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:14:39,896 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:14:39,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:39" (1/1) ... [2023-11-21 22:14:39,921 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:39" (1/1) ... [2023-11-21 22:14:39,989 INFO L138 Inliner]: procedures = 73, calls = 87, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 950 [2023-11-21 22:14:39,990 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:14:39,991 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:14:39,991 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:14:39,991 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:14:40,004 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:39" (1/1) ... [2023-11-21 22:14:40,005 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:39" (1/1) ... [2023-11-21 22:14:40,013 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:39" (1/1) ... [2023-11-21 22:14:40,043 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 22:14:40,043 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:39" (1/1) ... [2023-11-21 22:14:40,043 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:39" (1/1) ... [2023-11-21 22:14:40,084 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:39" (1/1) ... [2023-11-21 22:14:40,114 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:39" (1/1) ... [2023-11-21 22:14:40,118 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:39" (1/1) ... [2023-11-21 22:14:40,122 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:39" (1/1) ... [2023-11-21 22:14:40,145 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:14:40,146 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:14:40,146 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:14:40,147 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:14:40,148 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:39" (1/1) ... [2023-11-21 22:14:40,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:14:40,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:14:40,221 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:14:40,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:14:40,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:14:40,273 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-21 22:14:40,273 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-21 22:14:40,274 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-21 22:14:40,275 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-21 22:14:40,276 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-21 22:14:40,276 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-21 22:14:40,277 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-21 22:14:40,277 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-21 22:14:40,277 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-21 22:14:40,277 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-21 22:14:40,278 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-21 22:14:40,278 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-21 22:14:40,278 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-21 22:14:40,278 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-21 22:14:40,278 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-21 22:14:40,279 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-21 22:14:40,279 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-21 22:14:40,280 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-21 22:14:40,280 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-21 22:14:40,280 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-21 22:14:40,280 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-21 22:14:40,280 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-21 22:14:40,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:14:40,282 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-21 22:14:40,282 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-21 22:14:40,282 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-21 22:14:40,283 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-21 22:14:40,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:14:40,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:14:40,284 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-21 22:14:40,284 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-21 22:14:40,486 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:14:40,489 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:14:41,553 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:14:42,244 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:14:42,244 INFO L308 CfgBuilder]: Removed 17 assume(true) statements. [2023-11-21 22:14:42,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:14:42 BoogieIcfgContainer [2023-11-21 22:14:42,246 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:14:42,249 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:14:42,249 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:14:42,253 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:14:42,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:14:39" (1/3) ... [2023-11-21 22:14:42,254 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752387b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:14:42, skipping insertion in model container [2023-11-21 22:14:42,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:39" (2/3) ... [2023-11-21 22:14:42,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752387b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:14:42, skipping insertion in model container [2023-11-21 22:14:42,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:14:42" (3/3) ... [2023-11-21 22:14:42,256 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.10.cil-2.c [2023-11-21 22:14:42,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:14:42,279 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 22:14:42,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:14:42,351 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;@15ff0dbf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:14:42,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 22:14:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 249 states, 194 states have (on average 1.5051546391752577) internal successors, (292), 200 states have internal predecessors, (292), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-21 22:14:42,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-21 22:14:42,370 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:42,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:42,372 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:42,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:42,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1298320142, now seen corresponding path program 1 times [2023-11-21 22:14:42,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:42,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070421425] [2023-11-21 22:14:42,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:42,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:42,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:14:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:42,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:14:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:42,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:14:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:42,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:14:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:42,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:14:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:42,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:14:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:42,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:14:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:14:42,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:42,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070421425] [2023-11-21 22:14:42,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070421425] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:14:42,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:14:42,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 22:14:42,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229620412] [2023-11-21 22:14:42,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:14:42,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:14:42,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:42,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:14:42,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:14:42,999 INFO L87 Difference]: Start difference. First operand has 249 states, 194 states have (on average 1.5051546391752577) internal successors, (292), 200 states have internal predecessors, (292), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 22:14:43,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:43,991 INFO L93 Difference]: Finished difference Result 549 states and 805 transitions. [2023-11-21 22:14:43,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:14:43,994 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-11-21 22:14:43,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:44,016 INFO L225 Difference]: With dead ends: 549 [2023-11-21 22:14:44,016 INFO L226 Difference]: Without dead ends: 304 [2023-11-21 22:14:44,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:14:44,029 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 696 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:44,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 792 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 22:14:44,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-21 22:14:44,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 297. [2023-11-21 22:14:44,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 229 states have (on average 1.4279475982532752) internal successors, (327), 233 states have internal predecessors, (327), 46 states have call successors, (46), 21 states have call predecessors, (46), 20 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-21 22:14:44,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 417 transitions. [2023-11-21 22:14:44,164 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 417 transitions. Word has length 45 [2023-11-21 22:14:44,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:44,165 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 417 transitions. [2023-11-21 22:14:44,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 22:14:44,166 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 417 transitions. [2023-11-21 22:14:44,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-21 22:14:44,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:44,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:44,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:14:44,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:44,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:44,198 INFO L85 PathProgramCache]: Analyzing trace with hash -2077672531, now seen corresponding path program 1 times [2023-11-21 22:14:44,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:44,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454110377] [2023-11-21 22:14:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:44,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:44,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:14:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:44,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:14:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:44,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:14:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:44,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:14:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:44,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:14:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:44,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:14:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:44,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:14:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:14:44,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:44,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454110377] [2023-11-21 22:14:44,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454110377] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:14:44,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:14:44,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-21 22:14:44,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165204741] [2023-11-21 22:14:44,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:14:44,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 22:14:44,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:44,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 22:14:44,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:14:44,643 INFO L87 Difference]: Start difference. First operand 297 states and 417 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 22:14:45,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:45,574 INFO L93 Difference]: Finished difference Result 469 states and 631 transitions. [2023-11-21 22:14:45,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:14:45,576 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-11-21 22:14:45,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:45,589 INFO L225 Difference]: With dead ends: 469 [2023-11-21 22:14:45,589 INFO L226 Difference]: Without dead ends: 353 [2023-11-21 22:14:45,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:14:45,594 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 995 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:45,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 677 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 22:14:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-11-21 22:14:45,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 349. [2023-11-21 22:14:45,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 266 states have (on average 1.4097744360902256) internal successors, (375), 270 states have internal predecessors, (375), 54 states have call successors, (54), 28 states have call predecessors, (54), 27 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-21 22:14:45,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 481 transitions. [2023-11-21 22:14:45,686 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 481 transitions. Word has length 45 [2023-11-21 22:14:45,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:45,686 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 481 transitions. [2023-11-21 22:14:45,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 22:14:45,687 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 481 transitions. [2023-11-21 22:14:45,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-21 22:14:45,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:45,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:45,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:14:45,690 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:45,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:45,691 INFO L85 PathProgramCache]: Analyzing trace with hash -846343095, now seen corresponding path program 1 times [2023-11-21 22:14:45,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:45,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336557089] [2023-11-21 22:14:45,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:45,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:45,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:14:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:45,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:14:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:45,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:14:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:45,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:14:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:45,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:14:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:45,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:14:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:45,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:14:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:14:45,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:45,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336557089] [2023-11-21 22:14:45,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336557089] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:14:45,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:14:45,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:14:45,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167756564] [2023-11-21 22:14:45,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:14:45,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:14:45,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:45,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:14:45,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:14:45,814 INFO L87 Difference]: Start difference. First operand 349 states and 481 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:14:46,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:46,439 INFO L93 Difference]: Finished difference Result 677 states and 893 transitions. [2023-11-21 22:14:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:14:46,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2023-11-21 22:14:46,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:46,447 INFO L225 Difference]: With dead ends: 677 [2023-11-21 22:14:46,448 INFO L226 Difference]: Without dead ends: 508 [2023-11-21 22:14:46,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:14:46,456 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 618 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:46,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 551 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:14:46,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2023-11-21 22:14:46,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 489. [2023-11-21 22:14:46,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 361 states have (on average 1.3518005540166205) internal successors, (488), 365 states have internal predecessors, (488), 78 states have call successors, (78), 49 states have call predecessors, (78), 48 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-21 22:14:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 642 transitions. [2023-11-21 22:14:46,524 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 642 transitions. Word has length 46 [2023-11-21 22:14:46,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:46,525 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 642 transitions. [2023-11-21 22:14:46,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:14:46,525 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 642 transitions. [2023-11-21 22:14:46,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-21 22:14:46,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:46,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:46,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:14:46,529 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:46,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:46,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1954020961, now seen corresponding path program 1 times [2023-11-21 22:14:46,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:46,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81924612] [2023-11-21 22:14:46,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:46,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:46,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:14:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:46,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:14:46,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:46,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:14:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:46,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:14:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:46,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:14:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:46,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:14:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:46,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:14:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:14:46,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:46,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81924612] [2023-11-21 22:14:46,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81924612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:14:46,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:14:46,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:14:46,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973260253] [2023-11-21 22:14:46,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:14:46,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:14:46,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:46,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:14:46,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:14:46,696 INFO L87 Difference]: Start difference. First operand 489 states and 642 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:14:47,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:47,401 INFO L93 Difference]: Finished difference Result 859 states and 1096 transitions. [2023-11-21 22:14:47,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:14:47,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-11-21 22:14:47,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:47,409 INFO L225 Difference]: With dead ends: 859 [2023-11-21 22:14:47,410 INFO L226 Difference]: Without dead ends: 596 [2023-11-21 22:14:47,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:14:47,420 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 274 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:47,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 841 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:14:47,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2023-11-21 22:14:47,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 592. [2023-11-21 22:14:47,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 434 states have (on average 1.3387096774193548) internal successors, (581), 438 states have internal predecessors, (581), 94 states have call successors, (94), 63 states have call predecessors, (94), 62 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-21 22:14:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 767 transitions. [2023-11-21 22:14:47,509 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 767 transitions. Word has length 47 [2023-11-21 22:14:47,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:47,512 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 767 transitions. [2023-11-21 22:14:47,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:14:47,512 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 767 transitions. [2023-11-21 22:14:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-21 22:14:47,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:47,519 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] [2023-11-21 22:14:47,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:14:47,519 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:47,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:47,520 INFO L85 PathProgramCache]: Analyzing trace with hash 833629913, now seen corresponding path program 1 times [2023-11-21 22:14:47,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:47,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488688105] [2023-11-21 22:14:47,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:47,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:47,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:14:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:47,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:14:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:47,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:14:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:47,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:14:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:47,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:14:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:47,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:14:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:47,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:14:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:14:47,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:47,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488688105] [2023-11-21 22:14:47,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488688105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:14:47,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:14:47,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 22:14:47,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816033724] [2023-11-21 22:14:47,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:14:47,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:14:47,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:47,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:14:47,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:14:47,730 INFO L87 Difference]: Start difference. First operand 592 states and 767 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-21 22:14:48,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:48,547 INFO L93 Difference]: Finished difference Result 701 states and 898 transitions. [2023-11-21 22:14:48,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:14:48,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2023-11-21 22:14:48,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:48,554 INFO L225 Difference]: With dead ends: 701 [2023-11-21 22:14:48,554 INFO L226 Difference]: Without dead ends: 698 [2023-11-21 22:14:48,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-11-21 22:14:48,555 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 903 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:48,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 544 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 22:14:48,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2023-11-21 22:14:48,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 591. [2023-11-21 22:14:48,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 434 states have (on average 1.3317972350230414) internal successors, (578), 437 states have internal predecessors, (578), 93 states have call successors, (93), 63 states have call predecessors, (93), 62 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-21 22:14:48,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 763 transitions. [2023-11-21 22:14:48,634 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 763 transitions. Word has length 54 [2023-11-21 22:14:48,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:48,635 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 763 transitions. [2023-11-21 22:14:48,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-21 22:14:48,635 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 763 transitions. [2023-11-21 22:14:48,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-21 22:14:48,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:48,637 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] [2023-11-21 22:14:48,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:14:48,637 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:48,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:48,638 INFO L85 PathProgramCache]: Analyzing trace with hash 71425928, now seen corresponding path program 1 times [2023-11-21 22:14:48,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:48,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343329713] [2023-11-21 22:14:48,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:48,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:48,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:14:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:48,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:14:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:48,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:14:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:48,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:14:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:48,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:14:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:48,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:14:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:48,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:14:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:14:48,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:48,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343329713] [2023-11-21 22:14:48,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343329713] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:14:48,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312528892] [2023-11-21 22:14:48,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:48,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:14:48,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:14:48,896 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:14:48,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:14:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:49,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:14:49,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:14:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:14:49,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:14:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:14:49,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312528892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:14:49,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:14:49,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2023-11-21 22:14:49,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747142890] [2023-11-21 22:14:49,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:14:49,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:14:49,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:49,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:14:49,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:14:49,443 INFO L87 Difference]: Start difference. First operand 591 states and 763 transitions. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-21 22:14:50,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:50,894 INFO L93 Difference]: Finished difference Result 1380 states and 1724 transitions. [2023-11-21 22:14:50,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-21 22:14:50,895 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2023-11-21 22:14:50,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:50,906 INFO L225 Difference]: With dead ends: 1380 [2023-11-21 22:14:50,906 INFO L226 Difference]: Without dead ends: 1377 [2023-11-21 22:14:50,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2023-11-21 22:14:50,909 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 849 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:50,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [901 Valid, 1306 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-21 22:14:50,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2023-11-21 22:14:51,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 997. [2023-11-21 22:14:51,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 720 states have (on average 1.3097222222222222) internal successors, (943), 723 states have internal predecessors, (943), 157 states have call successors, (157), 119 states have call predecessors, (157), 118 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2023-11-21 22:14:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1256 transitions. [2023-11-21 22:14:51,081 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1256 transitions. Word has length 55 [2023-11-21 22:14:51,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:51,082 INFO L495 AbstractCegarLoop]: Abstraction has 997 states and 1256 transitions. [2023-11-21 22:14:51,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-21 22:14:51,083 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1256 transitions. [2023-11-21 22:14:51,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-21 22:14:51,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:51,085 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-21 22:14:51,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:14:51,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:14:51,300 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:51,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:51,301 INFO L85 PathProgramCache]: Analyzing trace with hash 354196761, now seen corresponding path program 2 times [2023-11-21 22:14:51,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:51,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115079821] [2023-11-21 22:14:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:51,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:51,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:14:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:51,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:14:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:51,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:14:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:51,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:14:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:51,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:14:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:51,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:14:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:51,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:14:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:14:51,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:51,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115079821] [2023-11-21 22:14:51,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115079821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:14:51,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:14:51,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:14:51,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19482319] [2023-11-21 22:14:51,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:14:51,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:14:51,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:51,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:14:51,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:14:51,429 INFO L87 Difference]: Start difference. First operand 997 states and 1256 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-21 22:14:52,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:52,187 INFO L93 Difference]: Finished difference Result 1418 states and 1769 transitions. [2023-11-21 22:14:52,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:14:52,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 58 [2023-11-21 22:14:52,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:52,194 INFO L225 Difference]: With dead ends: 1418 [2023-11-21 22:14:52,194 INFO L226 Difference]: Without dead ends: 797 [2023-11-21 22:14:52,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:14:52,197 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 482 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:52,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 780 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 22:14:52,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2023-11-21 22:14:52,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 795. [2023-11-21 22:14:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 578 states have (on average 1.301038062283737) internal successors, (752), 581 states have internal predecessors, (752), 125 states have call successors, (125), 91 states have call predecessors, (125), 90 states have return successors, (124), 124 states have call predecessors, (124), 124 states have call successors, (124) [2023-11-21 22:14:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1001 transitions. [2023-11-21 22:14:52,331 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1001 transitions. Word has length 58 [2023-11-21 22:14:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:52,331 INFO L495 AbstractCegarLoop]: Abstraction has 795 states and 1001 transitions. [2023-11-21 22:14:52,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-21 22:14:52,332 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1001 transitions. [2023-11-21 22:14:52,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-21 22:14:52,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:52,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:52,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:14:52,335 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:52,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:52,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1319020437, now seen corresponding path program 1 times [2023-11-21 22:14:52,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:52,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455830066] [2023-11-21 22:14:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:52,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:52,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:14:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:52,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:14:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:52,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:14:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:52,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:14:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:52,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:14:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:52,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:14:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:52,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:14:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:52,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-21 22:14:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:14:52,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:52,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455830066] [2023-11-21 22:14:52,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455830066] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:14:52,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:14:52,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:14:52,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268365223] [2023-11-21 22:14:52,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:14:52,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:14:52,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:52,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:14:52,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:14:52,467 INFO L87 Difference]: Start difference. First operand 795 states and 1001 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-21 22:14:53,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:53,204 INFO L93 Difference]: Finished difference Result 1430 states and 1773 transitions. [2023-11-21 22:14:53,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:14:53,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2023-11-21 22:14:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:53,214 INFO L225 Difference]: With dead ends: 1430 [2023-11-21 22:14:53,214 INFO L226 Difference]: Without dead ends: 1053 [2023-11-21 22:14:53,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:14:53,217 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 322 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:53,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 738 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:14:53,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2023-11-21 22:14:53,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 872. [2023-11-21 22:14:53,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 641 states have (on average 1.2979719188767551) internal successors, (832), 644 states have internal predecessors, (832), 132 states have call successors, (132), 98 states have call predecessors, (132), 97 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2023-11-21 22:14:53,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1095 transitions. [2023-11-21 22:14:53,382 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1095 transitions. Word has length 61 [2023-11-21 22:14:53,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:53,382 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1095 transitions. [2023-11-21 22:14:53,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-21 22:14:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1095 transitions. [2023-11-21 22:14:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-21 22:14:53,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:53,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:53,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:14:53,385 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:53,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:53,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1801627188, now seen corresponding path program 1 times [2023-11-21 22:14:53,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:53,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015613734] [2023-11-21 22:14:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:53,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:53,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:14:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:53,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:14:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:53,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:14:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:53,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-21 22:14:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:53,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 22:14:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:14:53,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:53,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015613734] [2023-11-21 22:14:53,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015613734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:14:53,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:14:53,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 22:14:53,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292988960] [2023-11-21 22:14:53,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:14:53,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:14:53,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:53,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:14:53,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:14:53,792 INFO L87 Difference]: Start difference. First operand 872 states and 1095 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:14:57,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:57,517 INFO L93 Difference]: Finished difference Result 1529 states and 2156 transitions. [2023-11-21 22:14:57,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 22:14:57,519 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2023-11-21 22:14:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:57,533 INFO L225 Difference]: With dead ends: 1529 [2023-11-21 22:14:57,533 INFO L226 Difference]: Without dead ends: 1359 [2023-11-21 22:14:57,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2023-11-21 22:14:57,541 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 1402 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1426 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:57,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1426 Valid, 1139 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-21 22:14:57,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2023-11-21 22:14:57,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1351. [2023-11-21 22:14:57,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1044 states have (on average 1.3639846743295019) internal successors, (1424), 1050 states have internal predecessors, (1424), 190 states have call successors, (190), 116 states have call predecessors, (190), 115 states have return successors, (230), 186 states have call predecessors, (230), 189 states have call successors, (230) [2023-11-21 22:14:57,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 1844 transitions. [2023-11-21 22:14:57,877 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 1844 transitions. Word has length 61 [2023-11-21 22:14:57,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:57,877 INFO L495 AbstractCegarLoop]: Abstraction has 1351 states and 1844 transitions. [2023-11-21 22:14:57,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:14:57,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 1844 transitions. [2023-11-21 22:14:57,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-21 22:14:57,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:57,881 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:57,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:14:57,882 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:57,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:57,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1345443602, now seen corresponding path program 1 times [2023-11-21 22:14:57,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:57,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904833320] [2023-11-21 22:14:57,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:57,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:58,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:14:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:58,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:14:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:58,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:14:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:58,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:14:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:58,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:14:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:58,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:14:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:58,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:14:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:58,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 22:14:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:14:58,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:58,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904833320] [2023-11-21 22:14:58,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904833320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:14:58,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:14:58,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-21 22:14:58,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424908347] [2023-11-21 22:14:58,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:14:58,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 22:14:58,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:58,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 22:14:58,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:14:58,156 INFO L87 Difference]: Start difference. First operand 1351 states and 1844 transitions. Second operand has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-21 22:14:59,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:59,343 INFO L93 Difference]: Finished difference Result 2363 states and 3045 transitions. [2023-11-21 22:14:59,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 22:14:59,344 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2023-11-21 22:14:59,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:59,355 INFO L225 Difference]: With dead ends: 2363 [2023-11-21 22:14:59,355 INFO L226 Difference]: Without dead ends: 1672 [2023-11-21 22:14:59,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2023-11-21 22:14:59,358 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 591 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:59,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [620 Valid, 997 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 22:14:59,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2023-11-21 22:14:59,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1672. [2023-11-21 22:14:59,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1260 states have (on average 1.3317460317460317) internal successors, (1678), 1266 states have internal predecessors, (1678), 246 states have call successors, (246), 165 states have call predecessors, (246), 164 states have return successors, (286), 242 states have call predecessors, (286), 245 states have call successors, (286) [2023-11-21 22:14:59,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2210 transitions. [2023-11-21 22:14:59,762 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2210 transitions. Word has length 70 [2023-11-21 22:14:59,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:59,763 INFO L495 AbstractCegarLoop]: Abstraction has 1672 states and 2210 transitions. [2023-11-21 22:14:59,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-21 22:14:59,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2210 transitions. [2023-11-21 22:14:59,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-21 22:14:59,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:59,766 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:59,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 22:14:59,766 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:59,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:59,767 INFO L85 PathProgramCache]: Analyzing trace with hash 946246933, now seen corresponding path program 1 times [2023-11-21 22:14:59,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:59,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195172497] [2023-11-21 22:14:59,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:59,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:59,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:14:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:59,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:14:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:59,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:14:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:59,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:14:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:59,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:14:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:59,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:14:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:59,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:14:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:59,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-21 22:14:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:14:59,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:59,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195172497] [2023-11-21 22:14:59,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195172497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:14:59,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:14:59,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:14:59,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138989886] [2023-11-21 22:14:59,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:14:59,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:14:59,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:59,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:14:59,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:14:59,886 INFO L87 Difference]: Start difference. First operand 1672 states and 2210 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-21 22:15:00,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:00,978 INFO L93 Difference]: Finished difference Result 2703 states and 3434 transitions. [2023-11-21 22:15:00,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:15:00,979 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2023-11-21 22:15:00,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:00,991 INFO L225 Difference]: With dead ends: 2703 [2023-11-21 22:15:00,992 INFO L226 Difference]: Without dead ends: 1846 [2023-11-21 22:15:00,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:15:00,995 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 225 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:00,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 903 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:15:00,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2023-11-21 22:15:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1717. [2023-11-21 22:15:01,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1297 states have (on average 1.3292212798766383) internal successors, (1724), 1303 states have internal predecessors, (1724), 250 states have call successors, (250), 169 states have call predecessors, (250), 168 states have return successors, (290), 246 states have call predecessors, (290), 249 states have call successors, (290) [2023-11-21 22:15:01,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2264 transitions. [2023-11-21 22:15:01,420 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2264 transitions. Word has length 71 [2023-11-21 22:15:01,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:01,420 INFO L495 AbstractCegarLoop]: Abstraction has 1717 states and 2264 transitions. [2023-11-21 22:15:01,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-21 22:15:01,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2264 transitions. [2023-11-21 22:15:01,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-21 22:15:01,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:01,426 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:01,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 22:15:01,426 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:15:01,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:01,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1972273845, now seen corresponding path program 1 times [2023-11-21 22:15:01,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:01,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408011465] [2023-11-21 22:15:01,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:01,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:15:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:15:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:15:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:15:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:15:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:15:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:15:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-21 22:15:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-21 22:15:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-21 22:15:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-21 22:15:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:15:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:15:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-21 22:15:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-21 22:15:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2023-11-21 22:15:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-21 22:15:01,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:01,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408011465] [2023-11-21 22:15:01,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408011465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:15:01,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36303224] [2023-11-21 22:15:01,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:01,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:01,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:01,916 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:01,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:15:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:02,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:15:02,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:15:02,144 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:15:02,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36303224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:02,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:15:02,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 14 [2023-11-21 22:15:02,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055094046] [2023-11-21 22:15:02,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:02,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:15:02,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:02,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:15:02,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-11-21 22:15:02,147 INFO L87 Difference]: Start difference. First operand 1717 states and 2264 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-21 22:15:02,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:02,749 INFO L93 Difference]: Finished difference Result 2546 states and 3275 transitions. [2023-11-21 22:15:02,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:15:02,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2023-11-21 22:15:02,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:02,761 INFO L225 Difference]: With dead ends: 2546 [2023-11-21 22:15:02,761 INFO L226 Difference]: Without dead ends: 1746 [2023-11-21 22:15:02,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-11-21 22:15:02,764 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 47 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:02,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 619 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:15:02,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2023-11-21 22:15:03,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1713. [2023-11-21 22:15:03,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1293 states have (on average 1.305491105955143) internal successors, (1688), 1299 states have internal predecessors, (1688), 250 states have call successors, (250), 169 states have call predecessors, (250), 168 states have return successors, (290), 246 states have call predecessors, (290), 249 states have call successors, (290) [2023-11-21 22:15:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 2228 transitions. [2023-11-21 22:15:03,237 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 2228 transitions. Word has length 102 [2023-11-21 22:15:03,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:03,238 INFO L495 AbstractCegarLoop]: Abstraction has 1713 states and 2228 transitions. [2023-11-21 22:15:03,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-21 22:15:03,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 2228 transitions. [2023-11-21 22:15:03,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-21 22:15:03,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:03,242 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:03,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:03,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:03,452 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:15:03,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:03,453 INFO L85 PathProgramCache]: Analyzing trace with hash -746135692, now seen corresponding path program 1 times [2023-11-21 22:15:03,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:03,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429995329] [2023-11-21 22:15:03,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:03,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:15:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:15:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:15:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:15:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:15:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:15:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:15:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-21 22:15:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-21 22:15:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-21 22:15:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-21 22:15:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:15:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:15:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-21 22:15:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-21 22:15:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2023-11-21 22:15:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-21 22:15:03,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:03,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429995329] [2023-11-21 22:15:03,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429995329] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:15:03,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493804985] [2023-11-21 22:15:03,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:03,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:03,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:03,910 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:03,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:15:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:04,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 22:15:04,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:15:04,155 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:15:04,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493804985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:04,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:15:04,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 16 [2023-11-21 22:15:04,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707906821] [2023-11-21 22:15:04,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:04,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:15:04,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:04,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:15:04,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:15:04,161 INFO L87 Difference]: Start difference. First operand 1713 states and 2228 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-21 22:15:04,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:04,777 INFO L93 Difference]: Finished difference Result 2599 states and 3281 transitions. [2023-11-21 22:15:04,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:15:04,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2023-11-21 22:15:04,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:04,788 INFO L225 Difference]: With dead ends: 2599 [2023-11-21 22:15:04,788 INFO L226 Difference]: Without dead ends: 1546 [2023-11-21 22:15:04,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:15:04,792 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 319 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:04,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1278 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:15:04,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2023-11-21 22:15:05,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1349. [2023-11-21 22:15:05,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1060 states have (on average 1.3339622641509434) internal successors, (1414), 1066 states have internal predecessors, (1414), 179 states have call successors, (179), 109 states have call predecessors, (179), 108 states have return successors, (219), 175 states have call predecessors, (219), 178 states have call successors, (219) [2023-11-21 22:15:05,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 1812 transitions. [2023-11-21 22:15:05,093 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 1812 transitions. Word has length 102 [2023-11-21 22:15:05,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:05,093 INFO L495 AbstractCegarLoop]: Abstraction has 1349 states and 1812 transitions. [2023-11-21 22:15:05,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-21 22:15:05,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 1812 transitions. [2023-11-21 22:15:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-21 22:15:05,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:05,097 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:05,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:05,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-21 22:15:05,319 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:15:05,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:05,319 INFO L85 PathProgramCache]: Analyzing trace with hash -551703242, now seen corresponding path program 1 times [2023-11-21 22:15:05,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:05,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139418759] [2023-11-21 22:15:05,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:05,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:15:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:15:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:15:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:15:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:15:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:15:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:15:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-21 22:15:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-21 22:15:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-21 22:15:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-21 22:15:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:15:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:15:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-11-21 22:15:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-11-21 22:15:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-21 22:15:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-21 22:15:05,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:05,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139418759] [2023-11-21 22:15:05,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139418759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:15:05,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453997194] [2023-11-21 22:15:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:05,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:05,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:05,580 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:05,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:15:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 22:15:05,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:15:05,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:15:05,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453997194] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:05,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:15:05,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2023-11-21 22:15:05,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426889851] [2023-11-21 22:15:05,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:05,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:15:05,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:05,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:15:05,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:15:05,840 INFO L87 Difference]: Start difference. First operand 1349 states and 1812 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-21 22:15:06,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:06,392 INFO L93 Difference]: Finished difference Result 1923 states and 2480 transitions. [2023-11-21 22:15:06,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:15:06,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2023-11-21 22:15:06,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:06,401 INFO L225 Difference]: With dead ends: 1923 [2023-11-21 22:15:06,402 INFO L226 Difference]: Without dead ends: 1303 [2023-11-21 22:15:06,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:15:06,404 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 66 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:06,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1310 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:15:06,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2023-11-21 22:15:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1211. [2023-11-21 22:15:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 958 states have (on average 1.3475991649269312) internal successors, (1291), 964 states have internal predecessors, (1291), 160 states have call successors, (160), 92 states have call predecessors, (160), 91 states have return successors, (200), 156 states have call predecessors, (200), 159 states have call successors, (200) [2023-11-21 22:15:06,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1651 transitions. [2023-11-21 22:15:06,654 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1651 transitions. Word has length 112 [2023-11-21 22:15:06,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:06,655 INFO L495 AbstractCegarLoop]: Abstraction has 1211 states and 1651 transitions. [2023-11-21 22:15:06,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-21 22:15:06,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1651 transitions. [2023-11-21 22:15:06,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-21 22:15:06,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:06,659 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:06,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:06,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-21 22:15:06,880 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:15:06,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:06,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2087667952, now seen corresponding path program 1 times [2023-11-21 22:15:06,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:06,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723857170] [2023-11-21 22:15:06,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:06,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:07,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:15:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:07,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:15:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:07,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:15:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:07,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:15:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:07,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:15:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:07,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:15:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:07,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:15:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:07,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-11-21 22:15:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:07,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-21 22:15:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:07,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-21 22:15:07,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:07,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-21 22:15:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:07,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:15:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:07,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:15:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:07,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-21 22:15:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:07,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-21 22:15:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:07,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-21 22:15:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-21 22:15:07,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:07,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723857170] [2023-11-21 22:15:07,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723857170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:07,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:07,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-21 22:15:07,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111322654] [2023-11-21 22:15:07,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:07,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:15:07,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:07,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:15:07,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:15:07,153 INFO L87 Difference]: Start difference. First operand 1211 states and 1651 transitions. Second operand has 10 states, 9 states have (on average 7.333333333333333) internal successors, (66), 6 states have internal predecessors, (66), 4 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-21 22:15:08,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:08,712 INFO L93 Difference]: Finished difference Result 1987 states and 2548 transitions. [2023-11-21 22:15:08,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-21 22:15:08,713 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.333333333333333) internal successors, (66), 6 states have internal predecessors, (66), 4 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 113 [2023-11-21 22:15:08,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:08,724 INFO L225 Difference]: With dead ends: 1987 [2023-11-21 22:15:08,724 INFO L226 Difference]: Without dead ends: 1520 [2023-11-21 22:15:08,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2023-11-21 22:15:08,727 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 761 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:08,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 1378 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 22:15:08,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2023-11-21 22:15:09,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1469. [2023-11-21 22:15:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1120 states have (on average 1.31875) internal successors, (1477), 1132 states have internal predecessors, (1477), 208 states have call successors, (208), 134 states have call predecessors, (208), 139 states have return successors, (260), 204 states have call predecessors, (260), 207 states have call successors, (260) [2023-11-21 22:15:09,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1945 transitions. [2023-11-21 22:15:09,208 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1945 transitions. Word has length 113 [2023-11-21 22:15:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:09,209 INFO L495 AbstractCegarLoop]: Abstraction has 1469 states and 1945 transitions. [2023-11-21 22:15:09,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.333333333333333) internal successors, (66), 6 states have internal predecessors, (66), 4 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-21 22:15:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1945 transitions. [2023-11-21 22:15:09,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-21 22:15:09,213 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:09,213 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:09,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 22:15:09,214 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:15:09,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:09,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1250370961, now seen corresponding path program 1 times [2023-11-21 22:15:09,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:09,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725492236] [2023-11-21 22:15:09,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:09,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:15:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:15:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:15:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:15:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:15:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:15:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:15:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-11-21 22:15:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-21 22:15:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-21 22:15:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-21 22:15:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:15:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:15:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-21 22:15:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-21 22:15:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-21 22:15:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-21 22:15:09,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:09,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725492236] [2023-11-21 22:15:09,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725492236] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:09,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:09,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 22:15:09,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613858841] [2023-11-21 22:15:09,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:09,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:15:09,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:09,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:15:09,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:15:09,349 INFO L87 Difference]: Start difference. First operand 1469 states and 1945 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-21 22:15:10,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:10,298 INFO L93 Difference]: Finished difference Result 2193 states and 2803 transitions. [2023-11-21 22:15:10,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:15:10,299 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 113 [2023-11-21 22:15:10,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:10,308 INFO L225 Difference]: With dead ends: 2193 [2023-11-21 22:15:10,308 INFO L226 Difference]: Without dead ends: 1468 [2023-11-21 22:15:10,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:15:10,311 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 632 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:10,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 730 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:15:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2023-11-21 22:15:10,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1461. [2023-11-21 22:15:10,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1112 states have (on average 1.3039568345323742) internal successors, (1450), 1124 states have internal predecessors, (1450), 208 states have call successors, (208), 134 states have call predecessors, (208), 139 states have return successors, (260), 204 states have call predecessors, (260), 207 states have call successors, (260) [2023-11-21 22:15:10,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 1918 transitions. [2023-11-21 22:15:10,656 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 1918 transitions. Word has length 113 [2023-11-21 22:15:10,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:10,656 INFO L495 AbstractCegarLoop]: Abstraction has 1461 states and 1918 transitions. [2023-11-21 22:15:10,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-21 22:15:10,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 1918 transitions. [2023-11-21 22:15:10,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-21 22:15:10,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:10,660 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:10,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-21 22:15:10,661 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:15:10,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:10,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1237591620, now seen corresponding path program 1 times [2023-11-21 22:15:10,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:10,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606708205] [2023-11-21 22:15:10,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:10,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:11,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:15:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:11,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:15:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:11,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:15:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:11,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:15:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:11,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:15:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:11,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:15:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:11,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:15:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:11,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-11-21 22:15:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:11,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-21 22:15:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:11,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-21 22:15:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:11,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-21 22:15:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:11,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:15:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:11,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:15:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:11,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-21 22:15:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:11,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-21 22:15:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:12,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-21 22:15:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-21 22:15:12,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:12,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606708205] [2023-11-21 22:15:12,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606708205] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:15:12,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057468392] [2023-11-21 22:15:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:12,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:12,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:12,006 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:12,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ab1ae7-baab-4565-ac3a-8e3e65603534/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:15:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:12,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-21 22:15:12,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:15:13,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:15:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-21 22:15:15,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057468392] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:15:15,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:15:15,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 17] total 57 [2023-11-21 22:15:15,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666074549] [2023-11-21 22:15:15,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:15:15,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-21 22:15:15,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:15,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-21 22:15:15,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=2714, Unknown=0, NotChecked=0, Total=3192 [2023-11-21 22:15:15,838 INFO L87 Difference]: Start difference. First operand 1461 states and 1918 transitions. Second operand has 57 states, 36 states have (on average 5.5) internal successors, (198), 42 states have internal predecessors, (198), 23 states have call successors, (44), 16 states have call predecessors, (44), 24 states have return successors, (46), 22 states have call predecessors, (46), 23 states have call successors, (46)