./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/neural-networks/cartpole_66_safe.c-amalgamation.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/neural-networks/cartpole_66_safe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 67874e8226795480a800268f24878d5cdf7f6eb4cbcc61fc5a38b44d8ef77a24 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:05:37,948 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:05:38,074 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:05:38,092 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:05:38,092 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:05:38,134 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:05:38,135 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:05:38,135 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:05:38,137 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:05:38,142 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:05:38,143 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:05:38,144 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:05:38,144 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:05:38,146 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:05:38,146 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:05:38,147 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:05:38,147 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:05:38,148 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:05:38,148 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:05:38,149 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:05:38,149 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:05:38,150 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:05:38,150 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:05:38,151 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:05:38,151 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:05:38,152 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:05:38,152 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:05:38,153 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:05:38,153 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:38,154 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:05:38,155 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:05:38,156 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:05:38,156 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:05:38,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:05:38,156 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:05:38,157 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:05:38,157 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:05:38,157 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:05:38,157 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:05:38,158 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_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67874e8226795480a800268f24878d5cdf7f6eb4cbcc61fc5a38b44d8ef77a24 [2023-11-19 08:05:38,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:05:38,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:05:38,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:05:38,534 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:05:38,534 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:05:38,536 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/neural-networks/cartpole_66_safe.c-amalgamation.i [2023-11-19 08:05:41,776 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:05:42,283 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:05:42,284 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/sv-benchmarks/c/neural-networks/cartpole_66_safe.c-amalgamation.i [2023-11-19 08:05:42,330 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/data/382a72cd8/26f2a3f55bb24fba8f1d0ed06066d978/FLAGe46e05eb6 [2023-11-19 08:05:42,350 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/data/382a72cd8/26f2a3f55bb24fba8f1d0ed06066d978 [2023-11-19 08:05:42,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:05:42,358 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:05:42,362 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:42,362 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:05:42,368 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:05:42,371 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:42" (1/1) ... [2023-11-19 08:05:42,372 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51986d5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:42, skipping insertion in model container [2023-11-19 08:05:42,372 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:42" (1/1) ... [2023-11-19 08:05:42,491 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:05:42,789 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 08:05:43,626 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_99ad3181-06c3-4300-8ce6-1dc269ede104/sv-benchmarks/c/neural-networks/cartpole_66_safe.c-amalgamation.i[63709,63722] [2023-11-19 08:05:43,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:44,151 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:05:44,180 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 08:05:44,236 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_99ad3181-06c3-4300-8ce6-1dc269ede104/sv-benchmarks/c/neural-networks/cartpole_66_safe.c-amalgamation.i[63709,63722] [2023-11-19 08:05:44,359 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:44,803 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:05:44,811 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:05:44,815 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:44 WrapperNode [2023-11-19 08:05:44,815 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:44,816 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:44,817 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:05:44,820 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:05:44,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:44" (1/1) ... [2023-11-19 08:05:44,930 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:44" (1/1) ... [2023-11-19 08:05:45,136 INFO L138 Inliner]: procedures = 621, calls = 4747, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 5015 [2023-11-19 08:05:45,137 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:45,137 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:05:45,138 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:05:45,138 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:05:45,148 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:44" (1/1) ... [2023-11-19 08:05:45,148 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:44" (1/1) ... [2023-11-19 08:05:45,301 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:44" (1/1) ... [2023-11-19 08:05:45,304 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:44" (1/1) ... [2023-11-19 08:05:45,427 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:44" (1/1) ... [2023-11-19 08:05:45,450 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:44" (1/1) ... [2023-11-19 08:05:45,479 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:44" (1/1) ... [2023-11-19 08:05:45,493 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:44" (1/1) ... [2023-11-19 08:05:45,513 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:05:45,514 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:05:45,514 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:05:45,514 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:05:45,515 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:44" (1/1) ... [2023-11-19 08:05:45,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:45,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:45,545 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:05:45,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:05:45,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-19 08:05:45,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:05:45,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2023-11-19 08:05:45,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-11-19 08:05:45,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:05:45,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:05:45,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:05:45,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:05:45,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:05:45,862 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:05:45,865 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:05:59,913 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:05:59,923 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:05:59,923 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-19 08:05:59,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:59 BoogieIcfgContainer [2023-11-19 08:05:59,928 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:05:59,931 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:05:59,931 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:05:59,935 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:05:59,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:05:42" (1/3) ... [2023-11-19 08:05:59,936 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb03d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:59, skipping insertion in model container [2023-11-19 08:05:59,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:44" (2/3) ... [2023-11-19 08:05:59,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb03d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:59, skipping insertion in model container [2023-11-19 08:05:59,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:59" (3/3) ... [2023-11-19 08:05:59,938 INFO L112 eAbstractionObserver]: Analyzing ICFG cartpole_66_safe.c-amalgamation.i [2023-11-19 08:05:59,961 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:05:59,961 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:06:00,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:06:00,042 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;@22660e1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:06:00,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:06:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 66 states have (on average 1.5454545454545454) internal successors, (102), 67 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:00,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 08:06:00,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:00,058 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] [2023-11-19 08:06:00,059 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:00,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:00,068 INFO L85 PathProgramCache]: Analyzing trace with hash -722203584, now seen corresponding path program 1 times [2023-11-19 08:06:00,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:00,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749238895] [2023-11-19 08:06:00,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:00,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:01,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:01,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749238895] [2023-11-19 08:06:01,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749238895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:01,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:01,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:06:01,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140132323] [2023-11-19 08:06:01,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:01,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:06:01,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:01,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:06:01,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:06:01,376 INFO L87 Difference]: Start difference. First operand has 68 states, 66 states have (on average 1.5454545454545454) internal successors, (102), 67 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:01,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:01,400 INFO L93 Difference]: Finished difference Result 132 states and 198 transitions. [2023-11-19 08:06:01,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:06:01,402 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-19 08:06:01,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:01,415 INFO L225 Difference]: With dead ends: 132 [2023-11-19 08:06:01,415 INFO L226 Difference]: Without dead ends: 64 [2023-11-19 08:06:01,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:06:01,422 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:01,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:01,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-19 08:06:01,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-19 08:06:01,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:01,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2023-11-19 08:06:01,462 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 35 [2023-11-19 08:06:01,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:01,463 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2023-11-19 08:06:01,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:01,464 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2023-11-19 08:06:01,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 08:06:01,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:01,466 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] [2023-11-19 08:06:01,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:06:01,466 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:01,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:01,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1732144578, now seen corresponding path program 1 times [2023-11-19 08:06:01,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:01,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914603399] [2023-11-19 08:06:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:01,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:02,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:02,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914603399] [2023-11-19 08:06:02,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914603399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:02,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:02,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:06:02,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113931853] [2023-11-19 08:06:02,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:02,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:02,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:02,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:02,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:02,467 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:02,513 INFO L93 Difference]: Finished difference Result 119 states and 150 transitions. [2023-11-19 08:06:02,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:02,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-19 08:06:02,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:02,517 INFO L225 Difference]: With dead ends: 119 [2023-11-19 08:06:02,518 INFO L226 Difference]: Without dead ends: 64 [2023-11-19 08:06:02,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:02,521 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:02,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 157 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:02,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-19 08:06:02,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-19 08:06:02,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:02,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2023-11-19 08:06:02,551 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 35 [2023-11-19 08:06:02,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:02,552 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2023-11-19 08:06:02,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:02,553 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2023-11-19 08:06:02,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 08:06:02,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:02,556 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] [2023-11-19 08:06:02,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:06:02,556 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:02,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:02,563 INFO L85 PathProgramCache]: Analyzing trace with hash -191083456, now seen corresponding path program 1 times [2023-11-19 08:06:02,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:02,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726260330] [2023-11-19 08:06:02,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:02,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:04,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:04,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726260330] [2023-11-19 08:06:04,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726260330] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:04,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:04,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:06:04,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978858352] [2023-11-19 08:06:04,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:04,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:04,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:04,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:04,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:04,095 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:04,146 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2023-11-19 08:06:04,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:04,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-19 08:06:04,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:04,149 INFO L225 Difference]: With dead ends: 114 [2023-11-19 08:06:04,150 INFO L226 Difference]: Without dead ends: 66 [2023-11-19 08:06:04,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:04,154 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 1 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:04,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 152 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:04,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-19 08:06:04,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2023-11-19 08:06:04,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.265625) internal successors, (81), 64 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:04,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2023-11-19 08:06:04,173 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 35 [2023-11-19 08:06:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:04,175 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2023-11-19 08:06:04,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:04,176 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2023-11-19 08:06:04,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-19 08:06:04,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:04,178 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] [2023-11-19 08:06:04,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:06:04,179 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:04,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:04,180 INFO L85 PathProgramCache]: Analyzing trace with hash 136670462, now seen corresponding path program 1 times [2023-11-19 08:06:04,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:04,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319243972] [2023-11-19 08:06:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:04,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:05,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:05,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319243972] [2023-11-19 08:06:05,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319243972] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:05,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206370843] [2023-11-19 08:06:05,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:05,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:05,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:05,812 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:05,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:06:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:07,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 5415 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:06:07,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:07,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:06:07,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206370843] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:07,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:06:07,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-19 08:06:07,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958744541] [2023-11-19 08:06:07,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:07,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:07,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:07,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:07,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:06:07,716 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:07,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:07,754 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2023-11-19 08:06:07,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:07,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-19 08:06:07,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:07,761 INFO L225 Difference]: With dead ends: 98 [2023-11-19 08:06:07,761 INFO L226 Difference]: Without dead ends: 66 [2023-11-19 08:06:07,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:06:07,771 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 4 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:07,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 147 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:07,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-19 08:06:07,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-19 08:06:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 65 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2023-11-19 08:06:07,787 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 37 [2023-11-19 08:06:07,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:07,788 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2023-11-19 08:06:07,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:07,789 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2023-11-19 08:06:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-19 08:06:07,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:07,796 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] [2023-11-19 08:06:07,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:08,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:08,013 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:08,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:08,014 INFO L85 PathProgramCache]: Analyzing trace with hash -998960327, now seen corresponding path program 1 times [2023-11-19 08:06:08,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:08,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137302270] [2023-11-19 08:06:08,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:08,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:06:09,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:09,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137302270] [2023-11-19 08:06:09,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137302270] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:09,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158779593] [2023-11-19 08:06:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:09,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:09,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:09,457 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:09,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:06:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:10,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 5433 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:06:10,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:06:10,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:06:10,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158779593] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:10,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:06:10,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-19 08:06:10,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695622679] [2023-11-19 08:06:10,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:10,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:10,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:10,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:10,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:06:10,913 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:10,932 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2023-11-19 08:06:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:10,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-19 08:06:10,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:10,934 INFO L225 Difference]: With dead ends: 83 [2023-11-19 08:06:10,935 INFO L226 Difference]: Without dead ends: 67 [2023-11-19 08:06:10,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:06:10,936 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 4 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:10,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 147 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:10,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-19 08:06:10,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-11-19 08:06:10,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:10,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2023-11-19 08:06:10,944 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 41 [2023-11-19 08:06:10,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:10,944 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2023-11-19 08:06:10,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:10,945 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2023-11-19 08:06:10,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 08:06:10,946 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:10,946 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] [2023-11-19 08:06:10,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:11,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:11,161 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:11,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:11,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1700699892, now seen corresponding path program 1 times [2023-11-19 08:06:11,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:11,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392365508] [2023-11-19 08:06:11,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:11,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:06:12,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:12,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392365508] [2023-11-19 08:06:12,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392365508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:12,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18828415] [2023-11-19 08:06:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:12,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:12,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:12,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:12,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:06:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:13,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 5451 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:06:13,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:06:13,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:06:13,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18828415] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:13,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:06:13,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-19 08:06:13,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854002866] [2023-11-19 08:06:13,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:13,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:13,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:13,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:13,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:06:13,840 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:13,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:13,859 INFO L93 Difference]: Finished difference Result 108 states and 134 transitions. [2023-11-19 08:06:13,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:13,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-11-19 08:06:13,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:13,862 INFO L225 Difference]: With dead ends: 108 [2023-11-19 08:06:13,862 INFO L226 Difference]: Without dead ends: 68 [2023-11-19 08:06:13,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:06:13,863 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 9 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:13,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 143 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:13,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-19 08:06:13,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-11-19 08:06:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:13,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2023-11-19 08:06:13,872 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 45 [2023-11-19 08:06:13,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:13,872 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2023-11-19 08:06:13,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:13,873 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2023-11-19 08:06:13,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 08:06:13,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:13,874 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] [2023-11-19 08:06:13,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:14,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:14,101 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:14,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:14,101 INFO L85 PathProgramCache]: Analyzing trace with hash -466973956, now seen corresponding path program 1 times [2023-11-19 08:06:14,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:14,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878686862] [2023-11-19 08:06:14,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:14,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:06:15,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:15,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878686862] [2023-11-19 08:06:15,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878686862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:15,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844842745] [2023-11-19 08:06:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:15,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:15,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:15,278 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:15,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:06:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:16,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 5458 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:06:16,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:06:16,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:06:16,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844842745] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:16,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:06:16,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-19 08:06:16,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726737284] [2023-11-19 08:06:16,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:16,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:16,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:16,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:16,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:06:16,757 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:16,785 INFO L93 Difference]: Finished difference Result 92 states and 113 transitions. [2023-11-19 08:06:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:16,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-19 08:06:16,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:16,787 INFO L225 Difference]: With dead ends: 92 [2023-11-19 08:06:16,788 INFO L226 Difference]: Without dead ends: 69 [2023-11-19 08:06:16,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:06:16,790 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 9 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:16,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 143 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-19 08:06:16,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-19 08:06:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.25) internal successors, (85), 68 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2023-11-19 08:06:16,799 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 49 [2023-11-19 08:06:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:16,802 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2023-11-19 08:06:16,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2023-11-19 08:06:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-19 08:06:16,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:16,805 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] [2023-11-19 08:06:16,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:17,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:17,016 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:17,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:17,017 INFO L85 PathProgramCache]: Analyzing trace with hash -657696188, now seen corresponding path program 1 times [2023-11-19 08:06:17,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:17,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594235685] [2023-11-19 08:06:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:17,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:06:18,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:18,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594235685] [2023-11-19 08:06:18,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594235685] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:18,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56323999] [2023-11-19 08:06:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:18,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:18,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:18,223 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:18,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:06:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:19,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 5465 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:06:19,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:06:19,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:06:19,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56323999] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:19,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:06:19,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-19 08:06:19,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136000955] [2023-11-19 08:06:19,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:19,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:19,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:19,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:19,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:06:19,676 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:19,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:19,703 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2023-11-19 08:06:19,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:19,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-11-19 08:06:19,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:19,705 INFO L225 Difference]: With dead ends: 76 [2023-11-19 08:06:19,708 INFO L226 Difference]: Without dead ends: 70 [2023-11-19 08:06:19,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:06:19,709 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 9 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:19,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 143 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:19,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-19 08:06:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-11-19 08:06:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2023-11-19 08:06:19,716 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 53 [2023-11-19 08:06:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:19,717 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2023-11-19 08:06:19,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2023-11-19 08:06:19,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-19 08:06:19,718 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:19,718 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] [2023-11-19 08:06:19,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:19,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:19,933 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:19,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:19,933 INFO L85 PathProgramCache]: Analyzing trace with hash 206339276, now seen corresponding path program 1 times [2023-11-19 08:06:19,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:19,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891341521] [2023-11-19 08:06:19,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:19,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:06:20,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:20,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891341521] [2023-11-19 08:06:20,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891341521] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:20,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189448977] [2023-11-19 08:06:20,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:20,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:21,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:21,001 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:21,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:06:22,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:22,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 5472 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:06:22,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:06:22,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:06:22,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189448977] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:22,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:22,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-11-19 08:06:22,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109576226] [2023-11-19 08:06:22,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:22,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:06:22,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:22,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:06:22,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:06:22,375 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:22,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:22,491 INFO L93 Difference]: Finished difference Result 138 states and 173 transitions. [2023-11-19 08:06:22,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:06:22,492 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-19 08:06:22,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:22,493 INFO L225 Difference]: With dead ends: 138 [2023-11-19 08:06:22,493 INFO L226 Difference]: Without dead ends: 85 [2023-11-19 08:06:22,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:06:22,497 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 22 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:22,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 358 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:06:22,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-19 08:06:22,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2023-11-19 08:06:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 83 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2023-11-19 08:06:22,504 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 57 [2023-11-19 08:06:22,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:22,505 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2023-11-19 08:06:22,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:22,505 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2023-11-19 08:06:22,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-19 08:06:22,508 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:22,508 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2023-11-19 08:06:22,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:22,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:22,729 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:22,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:22,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1718054341, now seen corresponding path program 2 times [2023-11-19 08:06:22,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:22,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819726222] [2023-11-19 08:06:22,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:22,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:23,985 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 08:06:23,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:23,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819726222] [2023-11-19 08:06:23,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819726222] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:23,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361894039] [2023-11-19 08:06:23,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:06:23,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:23,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:23,989 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:24,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:06:25,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:06:25,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:06:25,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 5537 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 08:06:25,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 08:06:25,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-19 08:06:25,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361894039] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:25,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:06:25,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2023-11-19 08:06:25,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163615934] [2023-11-19 08:06:25,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:25,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:06:25,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:25,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:06:25,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:06:25,293 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:25,322 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2023-11-19 08:06:25,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:06:25,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-19 08:06:25,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:25,325 INFO L225 Difference]: With dead ends: 99 [2023-11-19 08:06:25,325 INFO L226 Difference]: Without dead ends: 85 [2023-11-19 08:06:25,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:06:25,326 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 17 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:25,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 144 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:25,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-19 08:06:25,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-11-19 08:06:25,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 84 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2023-11-19 08:06:25,344 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 71 [2023-11-19 08:06:25,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:25,345 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2023-11-19 08:06:25,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:25,345 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2023-11-19 08:06:25,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-19 08:06:25,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:25,346 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:25,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:25,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:25,557 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:25,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:25,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1288300531, now seen corresponding path program 1 times [2023-11-19 08:06:25,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:25,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886939474] [2023-11-19 08:06:25,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:25,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-19 08:06:26,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:26,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886939474] [2023-11-19 08:06:26,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886939474] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:26,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669804359] [2023-11-19 08:06:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:26,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:26,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:26,653 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:26,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ad3181-06c3-4300-8ce6-1dc269ede104/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process