./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/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_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/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_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/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 69030034dd333d91bcd0f7615fd4a158a32a8c2c03a6334daabdaad4c77a89b5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:05:41,974 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:05:42,104 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:05:42,114 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:05:42,120 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:05:42,166 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:05:42,167 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:05:42,168 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:05:42,169 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:05:42,177 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:05:42,178 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:05:42,179 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:05:42,179 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:05:42,182 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:05:42,182 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:05:42,183 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:05:42,183 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:05:42,184 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:05:42,184 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:05:42,185 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:05:42,185 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:05:42,186 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:05:42,186 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:05:42,187 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:05:42,187 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:05:42,188 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:05:42,189 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:05:42,190 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:05:42,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:42,191 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:05:42,192 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:05:42,193 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:05:42,193 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:05:42,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:05:42,194 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:05:42,194 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:05:42,194 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:05:42,195 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:05:42,195 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:05:42,195 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_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69030034dd333d91bcd0f7615fd4a158a32a8c2c03a6334daabdaad4c77a89b5 [2023-11-19 08:05:42,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:05:42,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:05:42,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:05:42,604 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:05:42,605 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:05:42,606 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c [2023-11-19 08:05:46,039 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:05:46,331 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:05:46,332 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c [2023-11-19 08:05:46,350 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/data/48caa97a5/f4c2452587bd4982beb3dbf94ad04ae5/FLAGd2e490732 [2023-11-19 08:05:46,376 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/data/48caa97a5/f4c2452587bd4982beb3dbf94ad04ae5 [2023-11-19 08:05:46,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:05:46,385 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:05:46,386 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:46,387 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:05:46,393 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:05:46,394 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:46" (1/1) ... [2023-11-19 08:05:46,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70a98118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:46, skipping insertion in model container [2023-11-19 08:05:46,396 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:46" (1/1) ... [2023-11-19 08:05:46,473 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:05:46,630 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_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c[646,659] [2023-11-19 08:05:46,798 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:46,824 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:05:46,838 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_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c[646,659] [2023-11-19 08:05:46,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:46,933 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:05:46,934 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:46 WrapperNode [2023-11-19 08:05:46,934 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:46,935 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:46,935 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:05:46,935 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:05:46,942 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:46" (1/1) ... [2023-11-19 08:05:46,955 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:46" (1/1) ... [2023-11-19 08:05:47,008 INFO L138 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 862 [2023-11-19 08:05:47,009 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:47,010 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:05:47,010 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:05:47,010 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:05:47,020 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:46" (1/1) ... [2023-11-19 08:05:47,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:46" (1/1) ... [2023-11-19 08:05:47,025 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:46" (1/1) ... [2023-11-19 08:05:47,025 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:46" (1/1) ... [2023-11-19 08:05:47,039 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:46" (1/1) ... [2023-11-19 08:05:47,066 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:46" (1/1) ... [2023-11-19 08:05:47,069 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:46" (1/1) ... [2023-11-19 08:05:47,073 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:46" (1/1) ... [2023-11-19 08:05:47,079 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:05:47,080 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:05:47,080 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:05:47,080 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:05:47,081 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:46" (1/1) ... [2023-11-19 08:05:47,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:47,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:47,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:05:47,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:05:47,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:05:47,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:05:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-19 08:05:47,206 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-19 08:05:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:05:47,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:05:47,351 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:05:47,353 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:05:48,373 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:05:48,401 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:05:48,401 INFO L302 CfgBuilder]: Removed 13 assume(true) statements. [2023-11-19 08:05:48,408 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:48 BoogieIcfgContainer [2023-11-19 08:05:48,409 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:05:48,411 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:05:48,411 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:05:48,415 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:05:48,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:05:46" (1/3) ... [2023-11-19 08:05:48,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f481f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:48, skipping insertion in model container [2023-11-19 08:05:48,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:46" (2/3) ... [2023-11-19 08:05:48,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f481f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:48, skipping insertion in model container [2023-11-19 08:05:48,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:48" (3/3) ... [2023-11-19 08:05:48,419 INFO L112 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.4.cil.c [2023-11-19 08:05:48,437 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:05:48,437 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:05:48,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:05:48,508 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;@27d18204, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:05:48,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:05:48,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 277 states, 269 states have (on average 1.8550185873605949) internal successors, (499), 275 states have internal predecessors, (499), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 08:05:48,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 08:05:48,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:48,539 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] [2023-11-19 08:05:48,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:48,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:48,547 INFO L85 PathProgramCache]: Analyzing trace with hash 193087539, now seen corresponding path program 1 times [2023-11-19 08:05:48,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:48,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391500311] [2023-11-19 08:05:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:48,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:48,890 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 08:05:48,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:48,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391500311] [2023-11-19 08:05:48,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391500311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:48,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:48,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:48,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718578928] [2023-11-19 08:05:48,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:48,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:48,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:48,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:48,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:48,958 INFO L87 Difference]: Start difference. First operand has 277 states, 269 states have (on average 1.8550185873605949) internal successors, (499), 275 states have internal predecessors, (499), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:49,451 INFO L93 Difference]: Finished difference Result 730 states and 1341 transitions. [2023-11-19 08:05:49,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:49,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-19 08:05:49,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:49,469 INFO L225 Difference]: With dead ends: 730 [2023-11-19 08:05:49,469 INFO L226 Difference]: Without dead ends: 450 [2023-11-19 08:05:49,474 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 08:05:49,482 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 267 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:49,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 789 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:05:49,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2023-11-19 08:05:49,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 437. [2023-11-19 08:05:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 431 states have (on average 1.6009280742459397) internal successors, (690), 435 states have internal predecessors, (690), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:49,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 695 transitions. [2023-11-19 08:05:49,609 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 695 transitions. Word has length 29 [2023-11-19 08:05:49,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:49,610 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 695 transitions. [2023-11-19 08:05:49,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:49,611 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 695 transitions. [2023-11-19 08:05:49,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-19 08:05:49,620 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:49,621 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] [2023-11-19 08:05:49,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:05:49,621 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:49,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:49,622 INFO L85 PathProgramCache]: Analyzing trace with hash 909656450, now seen corresponding path program 1 times [2023-11-19 08:05:49,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:49,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738018846] [2023-11-19 08:05:49,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:49,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:49,718 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 08:05:49,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:49,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738018846] [2023-11-19 08:05:49,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738018846] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:49,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:49,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:49,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289535490] [2023-11-19 08:05:49,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:49,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:49,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:49,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:49,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:49,723 INFO L87 Difference]: Start difference. First operand 437 states and 695 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:49,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:49,876 INFO L93 Difference]: Finished difference Result 1149 states and 1853 transitions. [2023-11-19 08:05:49,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:49,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-19 08:05:49,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:49,883 INFO L225 Difference]: With dead ends: 1149 [2023-11-19 08:05:49,884 INFO L226 Difference]: Without dead ends: 726 [2023-11-19 08:05:49,887 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 08:05:49,889 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 330 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:49,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 1032 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:05:49,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2023-11-19 08:05:49,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 713. [2023-11-19 08:05:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 707 states have (on average 1.6350777934936351) internal successors, (1156), 711 states have internal predecessors, (1156), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1161 transitions. [2023-11-19 08:05:49,950 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1161 transitions. Word has length 40 [2023-11-19 08:05:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:49,951 INFO L495 AbstractCegarLoop]: Abstraction has 713 states and 1161 transitions. [2023-11-19 08:05:49,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:49,952 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1161 transitions. [2023-11-19 08:05:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-19 08:05:49,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:49,956 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 08:05:49,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:05:49,957 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:49,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:49,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1642726185, now seen corresponding path program 1 times [2023-11-19 08:05:49,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:49,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433496016] [2023-11-19 08:05:49,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:49,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:50,049 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 08:05:50,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:50,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433496016] [2023-11-19 08:05:50,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433496016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:50,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:50,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:50,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846315758] [2023-11-19 08:05:50,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:50,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:50,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:50,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:50,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:50,054 INFO L87 Difference]: Start difference. First operand 713 states and 1161 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:50,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:50,117 INFO L93 Difference]: Finished difference Result 1793 states and 2916 transitions. [2023-11-19 08:05:50,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:50,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-19 08:05:50,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:50,128 INFO L225 Difference]: With dead ends: 1793 [2023-11-19 08:05:50,128 INFO L226 Difference]: Without dead ends: 1105 [2023-11-19 08:05:50,134 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 08:05:50,137 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 357 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:50,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 817 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:05:50,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2023-11-19 08:05:50,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1094. [2023-11-19 08:05:50,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1088 states have (on average 1.6231617647058822) internal successors, (1766), 1092 states have internal predecessors, (1766), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1771 transitions. [2023-11-19 08:05:50,192 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1771 transitions. Word has length 41 [2023-11-19 08:05:50,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:50,193 INFO L495 AbstractCegarLoop]: Abstraction has 1094 states and 1771 transitions. [2023-11-19 08:05:50,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:50,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1771 transitions. [2023-11-19 08:05:50,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-19 08:05:50,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:50,199 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:50,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:05:50,202 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:50,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:50,203 INFO L85 PathProgramCache]: Analyzing trace with hash -49710902, now seen corresponding path program 1 times [2023-11-19 08:05:50,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:50,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192865709] [2023-11-19 08:05:50,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:50,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:50,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:50,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192865709] [2023-11-19 08:05:50,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192865709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:50,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:50,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:05:50,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514685554] [2023-11-19 08:05:50,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:50,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:05:50,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:50,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:05:50,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:50,344 INFO L87 Difference]: Start difference. First operand 1094 states and 1771 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:50,832 INFO L93 Difference]: Finished difference Result 3018 states and 4863 transitions. [2023-11-19 08:05:50,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:05:50,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-11-19 08:05:50,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:50,847 INFO L225 Difference]: With dead ends: 3018 [2023-11-19 08:05:50,847 INFO L226 Difference]: Without dead ends: 1949 [2023-11-19 08:05:50,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:05:50,851 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 588 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:50,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1586 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:05:50,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2023-11-19 08:05:50,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1716. [2023-11-19 08:05:50,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1710 states have (on average 1.5988304093567252) internal successors, (2734), 1714 states have internal predecessors, (2734), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:50,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2739 transitions. [2023-11-19 08:05:50,946 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2739 transitions. Word has length 48 [2023-11-19 08:05:50,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:50,947 INFO L495 AbstractCegarLoop]: Abstraction has 1716 states and 2739 transitions. [2023-11-19 08:05:50,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:50,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2739 transitions. [2023-11-19 08:05:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-19 08:05:50,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:50,949 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 08:05:50,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:05:50,950 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:50,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:50,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1086798880, now seen corresponding path program 1 times [2023-11-19 08:05:50,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:50,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228532780] [2023-11-19 08:05:50,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:50,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:51,080 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 08:05:51,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:51,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228532780] [2023-11-19 08:05:51,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228532780] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:51,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:51,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:05:51,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795107352] [2023-11-19 08:05:51,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:51,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:05:51,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:51,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:05:51,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:51,084 INFO L87 Difference]: Start difference. First operand 1716 states and 2739 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:51,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:51,644 INFO L93 Difference]: Finished difference Result 5101 states and 8048 transitions. [2023-11-19 08:05:51,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:05:51,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-11-19 08:05:51,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:51,667 INFO L225 Difference]: With dead ends: 5101 [2023-11-19 08:05:51,667 INFO L226 Difference]: Without dead ends: 3404 [2023-11-19 08:05:51,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:05:51,671 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 750 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:51,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 1077 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:05:51,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3404 states. [2023-11-19 08:05:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 3026. [2023-11-19 08:05:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3020 states have (on average 1.57317880794702) internal successors, (4751), 3024 states have internal predecessors, (4751), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:51,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 4756 transitions. [2023-11-19 08:05:51,815 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 4756 transitions. Word has length 53 [2023-11-19 08:05:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:51,815 INFO L495 AbstractCegarLoop]: Abstraction has 3026 states and 4756 transitions. [2023-11-19 08:05:51,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 4756 transitions. [2023-11-19 08:05:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-19 08:05:51,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:51,818 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 08:05:51,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:05:51,818 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:51,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:51,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1057985257, now seen corresponding path program 1 times [2023-11-19 08:05:51,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:51,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894033286] [2023-11-19 08:05:51,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:51,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:51,873 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 08:05:51,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:51,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894033286] [2023-11-19 08:05:51,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894033286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:51,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:51,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:51,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688355260] [2023-11-19 08:05:51,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:51,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:51,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:51,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:51,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:51,876 INFO L87 Difference]: Start difference. First operand 3026 states and 4756 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:52,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:52,050 INFO L93 Difference]: Finished difference Result 7113 states and 11141 transitions. [2023-11-19 08:05:52,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:52,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-11-19 08:05:52,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:52,076 INFO L225 Difference]: With dead ends: 7113 [2023-11-19 08:05:52,076 INFO L226 Difference]: Without dead ends: 4110 [2023-11-19 08:05:52,082 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 08:05:52,090 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 372 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:52,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 720 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:05:52,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4110 states. [2023-11-19 08:05:52,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4110 to 3926. [2023-11-19 08:05:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3920 states have (on average 1.5543367346938775) internal successors, (6093), 3924 states have internal predecessors, (6093), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:52,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 6098 transitions. [2023-11-19 08:05:52,308 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 6098 transitions. Word has length 53 [2023-11-19 08:05:52,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:52,309 INFO L495 AbstractCegarLoop]: Abstraction has 3926 states and 6098 transitions. [2023-11-19 08:05:52,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 6098 transitions. [2023-11-19 08:05:52,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-19 08:05:52,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:52,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:52,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:05:52,315 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:52,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:52,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1585990245, now seen corresponding path program 1 times [2023-11-19 08:05:52,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:52,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848787015] [2023-11-19 08:05:52,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:52,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:52,430 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 08:05:52,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:52,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848787015] [2023-11-19 08:05:52,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848787015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:52,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:52,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:52,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031982549] [2023-11-19 08:05:52,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:52,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:52,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:52,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:52,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:52,434 INFO L87 Difference]: Start difference. First operand 3926 states and 6098 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:52,881 INFO L93 Difference]: Finished difference Result 9442 states and 14788 transitions. [2023-11-19 08:05:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:52,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-19 08:05:52,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:52,952 INFO L225 Difference]: With dead ends: 9442 [2023-11-19 08:05:52,952 INFO L226 Difference]: Without dead ends: 5539 [2023-11-19 08:05:52,957 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 08:05:52,958 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 254 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:52,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 889 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:05:52,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5539 states. [2023-11-19 08:05:53,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5539 to 4758. [2023-11-19 08:05:53,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4758 states, 4752 states have (on average 1.4983164983164983) internal successors, (7120), 4756 states have internal predecessors, (7120), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4758 states to 4758 states and 7125 transitions. [2023-11-19 08:05:53,187 INFO L78 Accepts]: Start accepts. Automaton has 4758 states and 7125 transitions. Word has length 61 [2023-11-19 08:05:53,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:53,187 INFO L495 AbstractCegarLoop]: Abstraction has 4758 states and 7125 transitions. [2023-11-19 08:05:53,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:53,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4758 states and 7125 transitions. [2023-11-19 08:05:53,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 08:05:53,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:53,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:53,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 08:05:53,191 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:53,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:53,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1564004079, now seen corresponding path program 1 times [2023-11-19 08:05:53,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:53,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150099739] [2023-11-19 08:05:53,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:53,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:53,308 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 08:05:53,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:53,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150099739] [2023-11-19 08:05:53,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150099739] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:53,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:53,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:53,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665474143] [2023-11-19 08:05:53,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:53,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:53,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:53,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:53,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:53,314 INFO L87 Difference]: Start difference. First operand 4758 states and 7125 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:53,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:53,581 INFO L93 Difference]: Finished difference Result 9359 states and 14027 transitions. [2023-11-19 08:05:53,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:53,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-11-19 08:05:53,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:53,611 INFO L225 Difference]: With dead ends: 9359 [2023-11-19 08:05:53,611 INFO L226 Difference]: Without dead ends: 4624 [2023-11-19 08:05:53,619 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 08:05:53,620 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 349 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:53,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 447 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:05:53,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4624 states. [2023-11-19 08:05:53,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4624 to 4624. [2023-11-19 08:05:53,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4624 states, 4618 states have (on average 1.4766132524902555) internal successors, (6819), 4622 states have internal predecessors, (6819), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:53,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4624 states to 4624 states and 6824 transitions. [2023-11-19 08:05:53,860 INFO L78 Accepts]: Start accepts. Automaton has 4624 states and 6824 transitions. Word has length 63 [2023-11-19 08:05:53,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:53,861 INFO L495 AbstractCegarLoop]: Abstraction has 4624 states and 6824 transitions. [2023-11-19 08:05:53,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:53,862 INFO L276 IsEmpty]: Start isEmpty. Operand 4624 states and 6824 transitions. [2023-11-19 08:05:53,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-19 08:05:53,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:53,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:53,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 08:05:53,865 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:53,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:53,865 INFO L85 PathProgramCache]: Analyzing trace with hash 357537147, now seen corresponding path program 1 times [2023-11-19 08:05:53,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:53,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919161471] [2023-11-19 08:05:53,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:53,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:53,946 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 08:05:53,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:53,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919161471] [2023-11-19 08:05:53,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919161471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:53,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:53,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:53,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648938109] [2023-11-19 08:05:53,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:53,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:53,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:53,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:53,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:53,950 INFO L87 Difference]: Start difference. First operand 4624 states and 6824 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:54,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:54,176 INFO L93 Difference]: Finished difference Result 8802 states and 13083 transitions. [2023-11-19 08:05:54,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:54,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-11-19 08:05:54,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:54,216 INFO L225 Difference]: With dead ends: 8802 [2023-11-19 08:05:54,216 INFO L226 Difference]: Without dead ends: 4201 [2023-11-19 08:05:54,222 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 08:05:54,225 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 157 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:54,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 902 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:05:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2023-11-19 08:05:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3550. [2023-11-19 08:05:54,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3550 states, 3544 states have (on average 1.4923814898419865) internal successors, (5289), 3548 states have internal predecessors, (5289), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:54,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3550 states to 3550 states and 5294 transitions. [2023-11-19 08:05:54,412 INFO L78 Accepts]: Start accepts. Automaton has 3550 states and 5294 transitions. Word has length 64 [2023-11-19 08:05:54,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:54,413 INFO L495 AbstractCegarLoop]: Abstraction has 3550 states and 5294 transitions. [2023-11-19 08:05:54,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3550 states and 5294 transitions. [2023-11-19 08:05:54,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-19 08:05:54,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:54,415 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:54,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 08:05:54,416 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:54,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:54,416 INFO L85 PathProgramCache]: Analyzing trace with hash 550768718, now seen corresponding path program 1 times [2023-11-19 08:05:54,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:54,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277200563] [2023-11-19 08:05:54,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:54,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:54,524 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 08:05:54,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:54,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277200563] [2023-11-19 08:05:54,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277200563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:54,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:54,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 08:05:54,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953705155] [2023-11-19 08:05:54,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:54,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:05:54,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:54,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:05:54,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:05:54,528 INFO L87 Difference]: Start difference. First operand 3550 states and 5294 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:55,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:55,254 INFO L93 Difference]: Finished difference Result 9727 states and 14396 transitions. [2023-11-19 08:05:55,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 08:05:55,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-11-19 08:05:55,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:55,274 INFO L225 Difference]: With dead ends: 9727 [2023-11-19 08:05:55,274 INFO L226 Difference]: Without dead ends: 6402 [2023-11-19 08:05:55,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:05:55,282 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 978 mSDsluCounter, 1882 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 2444 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:55,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [978 Valid, 2444 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:05:55,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6402 states. [2023-11-19 08:05:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6402 to 4420. [2023-11-19 08:05:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4414 states have (on average 1.4841413683733575) internal successors, (6551), 4418 states have internal predecessors, (6551), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 6556 transitions. [2023-11-19 08:05:55,609 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 6556 transitions. Word has length 66 [2023-11-19 08:05:55,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:55,609 INFO L495 AbstractCegarLoop]: Abstraction has 4420 states and 6556 transitions. [2023-11-19 08:05:55,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:55,609 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 6556 transitions. [2023-11-19 08:05:55,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-19 08:05:55,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:55,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:55,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 08:05:55,612 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:55,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:55,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1157262175, now seen corresponding path program 1 times [2023-11-19 08:05:55,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:55,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753066465] [2023-11-19 08:05:55,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:55,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:55,716 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 08:05:55,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:55,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753066465] [2023-11-19 08:05:55,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753066465] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:55,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:55,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 08:05:55,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700666014] [2023-11-19 08:05:55,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:55,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:05:55,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:55,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:05:55,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:05:55,719 INFO L87 Difference]: Start difference. First operand 4420 states and 6556 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:56,264 INFO L93 Difference]: Finished difference Result 10671 states and 15672 transitions. [2023-11-19 08:05:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 08:05:56,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-19 08:05:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:56,282 INFO L225 Difference]: With dead ends: 10671 [2023-11-19 08:05:56,282 INFO L226 Difference]: Without dead ends: 6476 [2023-11-19 08:05:56,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:05:56,289 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 859 mSDsluCounter, 2426 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 2973 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:56,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 2973 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:05:56,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6476 states. [2023-11-19 08:05:56,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6476 to 4730. [2023-11-19 08:05:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4730 states, 4724 states have (on average 1.4739627434377647) internal successors, (6963), 4728 states have internal predecessors, (6963), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 6968 transitions. [2023-11-19 08:05:56,610 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 6968 transitions. Word has length 67 [2023-11-19 08:05:56,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:56,611 INFO L495 AbstractCegarLoop]: Abstraction has 4730 states and 6968 transitions. [2023-11-19 08:05:56,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:56,612 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 6968 transitions. [2023-11-19 08:05:56,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-19 08:05:56,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:56,614 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:56,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 08:05:56,614 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:56,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:56,615 INFO L85 PathProgramCache]: Analyzing trace with hash 587846131, now seen corresponding path program 1 times [2023-11-19 08:05:56,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:56,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280863332] [2023-11-19 08:05:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:56,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:56,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:56,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:56,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280863332] [2023-11-19 08:05:56,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280863332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:56,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:56,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:56,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517675331] [2023-11-19 08:05:56,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:56,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:56,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:56,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:56,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:56,664 INFO L87 Difference]: Start difference. First operand 4730 states and 6968 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:56,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:56,983 INFO L93 Difference]: Finished difference Result 9971 states and 14664 transitions. [2023-11-19 08:05:56,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:56,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-11-19 08:05:56,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:56,995 INFO L225 Difference]: With dead ends: 9971 [2023-11-19 08:05:56,996 INFO L226 Difference]: Without dead ends: 5262 [2023-11-19 08:05:57,002 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 08:05:57,003 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 139 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:57,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 826 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:05:57,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5262 states. [2023-11-19 08:05:57,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5262 to 5188. [2023-11-19 08:05:57,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5188 states, 5182 states have (on average 1.4698957931300656) internal successors, (7617), 5186 states have internal predecessors, (7617), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:57,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5188 states to 5188 states and 7622 transitions. [2023-11-19 08:05:57,267 INFO L78 Accepts]: Start accepts. Automaton has 5188 states and 7622 transitions. Word has length 79 [2023-11-19 08:05:57,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:57,268 INFO L495 AbstractCegarLoop]: Abstraction has 5188 states and 7622 transitions. [2023-11-19 08:05:57,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:57,268 INFO L276 IsEmpty]: Start isEmpty. Operand 5188 states and 7622 transitions. [2023-11-19 08:05:57,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-19 08:05:57,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:57,271 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:57,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 08:05:57,272 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:57,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:57,272 INFO L85 PathProgramCache]: Analyzing trace with hash -880253353, now seen corresponding path program 1 times [2023-11-19 08:05:57,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:57,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297010578] [2023-11-19 08:05:57,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:57,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:57,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:57,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297010578] [2023-11-19 08:05:57,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297010578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:57,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:57,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:05:57,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923640305] [2023-11-19 08:05:57,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:57,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:05:57,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:57,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:05:57,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:57,366 INFO L87 Difference]: Start difference. First operand 5188 states and 7622 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:58,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:58,041 INFO L93 Difference]: Finished difference Result 13874 states and 20224 transitions. [2023-11-19 08:05:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:05:58,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2023-11-19 08:05:58,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:58,062 INFO L225 Difference]: With dead ends: 13874 [2023-11-19 08:05:58,062 INFO L226 Difference]: Without dead ends: 8585 [2023-11-19 08:05:58,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:05:58,072 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 654 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:58,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 1276 Invalid, 309 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [16 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:05:58,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2023-11-19 08:05:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 7651. [2023-11-19 08:05:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7651 states, 7645 states have (on average 1.4395029431000654) internal successors, (11005), 7649 states have internal predecessors, (11005), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7651 states to 7651 states and 11010 transitions. [2023-11-19 08:05:58,447 INFO L78 Accepts]: Start accepts. Automaton has 7651 states and 11010 transitions. Word has length 91 [2023-11-19 08:05:58,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:58,448 INFO L495 AbstractCegarLoop]: Abstraction has 7651 states and 11010 transitions. [2023-11-19 08:05:58,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:58,448 INFO L276 IsEmpty]: Start isEmpty. Operand 7651 states and 11010 transitions. [2023-11-19 08:05:58,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-19 08:05:58,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:58,451 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:58,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 08:05:58,452 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:58,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:58,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1094322202, now seen corresponding path program 1 times [2023-11-19 08:05:58,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:58,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15664653] [2023-11-19 08:05:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:58,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:58,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:58,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15664653] [2023-11-19 08:05:58,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15664653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:58,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:58,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:58,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478228214] [2023-11-19 08:05:58,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:58,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:58,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:58,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:58,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:58,527 INFO L87 Difference]: Start difference. First operand 7651 states and 11010 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:58,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:58,799 INFO L93 Difference]: Finished difference Result 11033 states and 15906 transitions. [2023-11-19 08:05:58,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:58,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2023-11-19 08:05:58,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:58,808 INFO L225 Difference]: With dead ends: 11033 [2023-11-19 08:05:58,808 INFO L226 Difference]: Without dead ends: 3385 [2023-11-19 08:05:58,818 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 08:05:58,819 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 343 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:58,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 525 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:05:58,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3385 states. [2023-11-19 08:05:59,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3385 to 3332. [2023-11-19 08:05:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3326 states have (on average 1.34996993385448) internal successors, (4490), 3330 states have internal predecessors, (4490), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:59,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 4495 transitions. [2023-11-19 08:05:59,019 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 4495 transitions. Word has length 99 [2023-11-19 08:05:59,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:59,020 INFO L495 AbstractCegarLoop]: Abstraction has 3332 states and 4495 transitions. [2023-11-19 08:05:59,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:59,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 4495 transitions. [2023-11-19 08:05:59,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-19 08:05:59,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:59,023 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:59,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 08:05:59,024 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:59,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:59,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1249050813, now seen corresponding path program 1 times [2023-11-19 08:05:59,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:59,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925033295] [2023-11-19 08:05:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:59,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:59,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:59,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925033295] [2023-11-19 08:05:59,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925033295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:59,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:59,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:05:59,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404687736] [2023-11-19 08:05:59,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:59,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:05:59,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:59,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:05:59,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:05:59,135 INFO L87 Difference]: Start difference. First operand 3332 states and 4495 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:59,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:59,451 INFO L93 Difference]: Finished difference Result 7624 states and 10269 transitions. [2023-11-19 08:05:59,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:05:59,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2023-11-19 08:05:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:59,461 INFO L225 Difference]: With dead ends: 7624 [2023-11-19 08:05:59,461 INFO L226 Difference]: Without dead ends: 4469 [2023-11-19 08:05:59,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:05:59,467 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 557 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 2393 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 08:05:59,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 2393 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:05:59,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2023-11-19 08:05:59,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 3334. [2023-11-19 08:05:59,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 3328 states have (on average 1.3479567307692308) internal successors, (4486), 3332 states have internal predecessors, (4486), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:59,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 4491 transitions. [2023-11-19 08:05:59,641 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 4491 transitions. Word has length 101 [2023-11-19 08:05:59,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:59,641 INFO L495 AbstractCegarLoop]: Abstraction has 3334 states and 4491 transitions. [2023-11-19 08:05:59,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:59,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 4491 transitions. [2023-11-19 08:05:59,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-19 08:05:59,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:59,643 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:59,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 08:05:59,644 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:59,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:59,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2071034270, now seen corresponding path program 1 times [2023-11-19 08:05:59,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:59,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024244923] [2023-11-19 08:05:59,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:59,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:59,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:59,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024244923] [2023-11-19 08:05:59,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024244923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:59,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449122152] [2023-11-19 08:05:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:59,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:59,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:59,758 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:59,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:05:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:59,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:05:59,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:06:00,069 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:06:00,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449122152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:00,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:06:00,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 08:06:00,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393435528] [2023-11-19 08:06:00,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:00,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:00,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:00,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:00,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:06:00,072 INFO L87 Difference]: Start difference. First operand 3334 states and 4491 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:00,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:00,242 INFO L93 Difference]: Finished difference Result 3977 states and 5352 transitions. [2023-11-19 08:06:00,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:00,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-11-19 08:06:00,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:00,252 INFO L225 Difference]: With dead ends: 3977 [2023-11-19 08:06:00,252 INFO L226 Difference]: Without dead ends: 3973 [2023-11-19 08:06:00,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:06:00,255 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 237 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:00,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 811 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:00,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3973 states. [2023-11-19 08:06:00,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3973 to 3923. [2023-11-19 08:06:00,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3923 states, 3917 states have (on average 1.34516211386265) internal successors, (5269), 3921 states have internal predecessors, (5269), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:00,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3923 states to 3923 states and 5274 transitions. [2023-11-19 08:06:00,504 INFO L78 Accepts]: Start accepts. Automaton has 3923 states and 5274 transitions. Word has length 103 [2023-11-19 08:06:00,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:00,505 INFO L495 AbstractCegarLoop]: Abstraction has 3923 states and 5274 transitions. [2023-11-19 08:06:00,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:00,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3923 states and 5274 transitions. [2023-11-19 08:06:00,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-19 08:06:00,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:00,509 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:00,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:00,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 08:06:00,723 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:00,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:00,723 INFO L85 PathProgramCache]: Analyzing trace with hash -62225411, now seen corresponding path program 1 times [2023-11-19 08:06:00,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:00,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272247612] [2023-11-19 08:06:00,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:00,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:00,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:00,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272247612] [2023-11-19 08:06:00,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272247612] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:00,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315921303] [2023-11-19 08:06:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:00,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:00,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:00,868 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:00,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:06:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:01,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:06:01,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:06:01,150 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:06:01,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315921303] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:01,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:06:01,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 08:06:01,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250904834] [2023-11-19 08:06:01,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:01,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:01,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:01,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:01,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:06:01,154 INFO L87 Difference]: Start difference. First operand 3923 states and 5274 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:01,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:01,309 INFO L93 Difference]: Finished difference Result 6990 states and 9448 transitions. [2023-11-19 08:06:01,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:01,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2023-11-19 08:06:01,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:01,317 INFO L225 Difference]: With dead ends: 6990 [2023-11-19 08:06:01,317 INFO L226 Difference]: Without dead ends: 3072 [2023-11-19 08:06:01,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:06:01,324 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 268 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:01,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 426 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:01,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2023-11-19 08:06:01,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2850. [2023-11-19 08:06:01,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 2844 states have (on average 1.3259493670886076) internal successors, (3771), 2848 states have internal predecessors, (3771), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:01,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 3776 transitions. [2023-11-19 08:06:01,464 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 3776 transitions. Word has length 159 [2023-11-19 08:06:01,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:01,464 INFO L495 AbstractCegarLoop]: Abstraction has 2850 states and 3776 transitions. [2023-11-19 08:06:01,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:01,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 3776 transitions. [2023-11-19 08:06:01,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-11-19 08:06:01,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:01,469 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:01,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:01,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 08:06:01,689 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:01,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:01,690 INFO L85 PathProgramCache]: Analyzing trace with hash 397670283, now seen corresponding path program 1 times [2023-11-19 08:06:01,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:01,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850778413] [2023-11-19 08:06:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:01,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:06:01,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:01,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850778413] [2023-11-19 08:06:01,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850778413] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:01,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297844791] [2023-11-19 08:06:01,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:01,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:01,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:01,875 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:01,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:06:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:02,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:06:02,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 08:06:02,107 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:06:02,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297844791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:02,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:06:02,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 08:06:02,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278688186] [2023-11-19 08:06:02,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:02,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:02,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:02,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:02,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:06:02,110 INFO L87 Difference]: Start difference. First operand 2850 states and 3776 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:02,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:02,307 INFO L93 Difference]: Finished difference Result 5528 states and 7365 transitions. [2023-11-19 08:06:02,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:02,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2023-11-19 08:06:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:02,313 INFO L225 Difference]: With dead ends: 5528 [2023-11-19 08:06:02,314 INFO L226 Difference]: Without dead ends: 2850 [2023-11-19 08:06:02,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:06:02,318 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 278 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:02,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 398 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:02,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2023-11-19 08:06:02,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2850. [2023-11-19 08:06:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 2844 states have (on average 1.2921940928270041) internal successors, (3675), 2848 states have internal predecessors, (3675), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:02,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 3680 transitions. [2023-11-19 08:06:02,483 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 3680 transitions. Word has length 162 [2023-11-19 08:06:02,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:02,484 INFO L495 AbstractCegarLoop]: Abstraction has 2850 states and 3680 transitions. [2023-11-19 08:06:02,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:02,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 3680 transitions. [2023-11-19 08:06:02,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-19 08:06:02,488 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:02,488 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:02,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:02,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 08:06:02,705 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:02,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:02,706 INFO L85 PathProgramCache]: Analyzing trace with hash -276776698, now seen corresponding path program 1 times [2023-11-19 08:06:02,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:02,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422698673] [2023-11-19 08:06:02,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:02,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:06:02,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:02,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422698673] [2023-11-19 08:06:02,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422698673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:02,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706476413] [2023-11-19 08:06:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:02,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:02,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:02,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:02,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:06:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:03,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:06:03,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 08:06:03,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:06:03,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706476413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:03,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:06:03,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 08:06:03,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089063394] [2023-11-19 08:06:03,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:03,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:03,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:03,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:03,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:06:03,072 INFO L87 Difference]: Start difference. First operand 2850 states and 3680 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:03,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:03,478 INFO L93 Difference]: Finished difference Result 6447 states and 8490 transitions. [2023-11-19 08:06:03,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:03,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2023-11-19 08:06:03,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:03,487 INFO L225 Difference]: With dead ends: 6447 [2023-11-19 08:06:03,488 INFO L226 Difference]: Without dead ends: 3769 [2023-11-19 08:06:03,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:06:03,493 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 209 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:03,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 674 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:06:03,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2023-11-19 08:06:03,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3681. [2023-11-19 08:06:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3681 states, 3675 states have (on average 1.2612244897959184) internal successors, (4635), 3679 states have internal predecessors, (4635), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:03,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 4640 transitions. [2023-11-19 08:06:03,772 INFO L78 Accepts]: Start accepts. Automaton has 3681 states and 4640 transitions. Word has length 163 [2023-11-19 08:06:03,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:03,773 INFO L495 AbstractCegarLoop]: Abstraction has 3681 states and 4640 transitions. [2023-11-19 08:06:03,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:03,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3681 states and 4640 transitions. [2023-11-19 08:06:03,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-19 08:06:03,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:03,778 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:03,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:03,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:03,993 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:03,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:03,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1158970864, now seen corresponding path program 1 times [2023-11-19 08:06:03,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:03,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946536143] [2023-11-19 08:06:03,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:03,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:06:04,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:04,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946536143] [2023-11-19 08:06:04,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946536143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:04,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642161610] [2023-11-19 08:06:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:04,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:04,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:04,488 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:04,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:06:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:04,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 08:06:04,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:06:04,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:06:05,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642161610] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:05,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:05,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2023-11-19 08:06:05,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771314971] [2023-11-19 08:06:05,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:05,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 08:06:05,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:05,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 08:06:05,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:06:05,102 INFO L87 Difference]: Start difference. First operand 3681 states and 4640 transitions. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:05,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:05,775 INFO L93 Difference]: Finished difference Result 9919 states and 12514 transitions. [2023-11-19 08:06:05,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 08:06:05,776 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2023-11-19 08:06:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:05,790 INFO L225 Difference]: With dead ends: 9919 [2023-11-19 08:06:05,791 INFO L226 Difference]: Without dead ends: 6410 [2023-11-19 08:06:05,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:06:05,802 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 949 mSDsluCounter, 3367 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 3922 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:05,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [949 Valid, 3922 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:06:05,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6410 states. [2023-11-19 08:06:06,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6410 to 5218. [2023-11-19 08:06:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5218 states, 5212 states have (on average 1.266308518802763) internal successors, (6600), 5216 states have internal predecessors, (6600), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:06,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 6605 transitions. [2023-11-19 08:06:06,123 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 6605 transitions. Word has length 165 [2023-11-19 08:06:06,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:06,123 INFO L495 AbstractCegarLoop]: Abstraction has 5218 states and 6605 transitions. [2023-11-19 08:06:06,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:06,124 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 6605 transitions. [2023-11-19 08:06:06,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-11-19 08:06:06,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:06,131 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:06,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-19 08:06:06,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:06,345 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:06,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:06,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1576222772, now seen corresponding path program 1 times [2023-11-19 08:06:06,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:06,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082061234] [2023-11-19 08:06:06,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:06,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 08:06:06,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:06,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082061234] [2023-11-19 08:06:06,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082061234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:06,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332873061] [2023-11-19 08:06:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:06,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:06,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:06,949 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:06,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:06:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:07,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 08:06:07,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 08:06:07,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 08:06:07,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332873061] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:07,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:07,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2023-11-19 08:06:07,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001876068] [2023-11-19 08:06:07,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:07,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 08:06:07,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:07,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 08:06:07,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:06:07,734 INFO L87 Difference]: Start difference. First operand 5218 states and 6605 transitions. Second operand has 11 states, 11 states have (on average 23.545454545454547) internal successors, (259), 11 states have internal predecessors, (259), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:08,733 INFO L93 Difference]: Finished difference Result 13593 states and 17135 transitions. [2023-11-19 08:06:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 08:06:08,735 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 23.545454545454547) internal successors, (259), 11 states have internal predecessors, (259), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2023-11-19 08:06:08,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:08,758 INFO L225 Difference]: With dead ends: 13593 [2023-11-19 08:06:08,758 INFO L226 Difference]: Without dead ends: 8547 [2023-11-19 08:06:08,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-11-19 08:06:08,765 INFO L413 NwaCegarLoop]: 1040 mSDtfsCounter, 1588 mSDsluCounter, 7554 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 8594 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:08,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1588 Valid, 8594 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:06:08,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8547 states. [2023-11-19 08:06:09,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8547 to 6629. [2023-11-19 08:06:09,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6629 states, 6623 states have (on average 1.2675524686697872) internal successors, (8395), 6627 states have internal predecessors, (8395), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:09,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 8400 transitions. [2023-11-19 08:06:09,118 INFO L78 Accepts]: Start accepts. Automaton has 6629 states and 8400 transitions. Word has length 265 [2023-11-19 08:06:09,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:09,118 INFO L495 AbstractCegarLoop]: Abstraction has 6629 states and 8400 transitions. [2023-11-19 08:06:09,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.545454545454547) internal successors, (259), 11 states have internal predecessors, (259), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:09,119 INFO L276 IsEmpty]: Start isEmpty. Operand 6629 states and 8400 transitions. [2023-11-19 08:06:09,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2023-11-19 08:06:09,126 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:09,126 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:09,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:09,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-19 08:06:09,341 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:09,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:09,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1321811141, now seen corresponding path program 1 times [2023-11-19 08:06:09,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:09,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109642124] [2023-11-19 08:06:09,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:09,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 15 proven. 457 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 08:06:10,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:10,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109642124] [2023-11-19 08:06:10,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109642124] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:10,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552470027] [2023-11-19 08:06:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:10,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:10,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:10,366 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:10,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:06:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:10,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 08:06:10,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 15 proven. 457 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 08:06:11,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:11,556 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 15 proven. 457 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 08:06:11,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552470027] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:11,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:11,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2023-11-19 08:06:11,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658864381] [2023-11-19 08:06:11,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:11,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 08:06:11,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:11,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:06:11,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:06:11,562 INFO L87 Difference]: Start difference. First operand 6629 states and 8400 transitions. Second operand has 13 states, 13 states have (on average 27.53846153846154) internal successors, (358), 13 states have internal predecessors, (358), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:13,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:13,205 INFO L93 Difference]: Finished difference Result 17149 states and 21607 transitions. [2023-11-19 08:06:13,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-19 08:06:13,206 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 27.53846153846154) internal successors, (358), 13 states have internal predecessors, (358), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 366 [2023-11-19 08:06:13,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:13,229 INFO L225 Difference]: With dead ends: 17149 [2023-11-19 08:06:13,229 INFO L226 Difference]: Without dead ends: 10692 [2023-11-19 08:06:13,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2023-11-19 08:06:13,239 INFO L413 NwaCegarLoop]: 1559 mSDtfsCounter, 2343 mSDsluCounter, 14380 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2343 SdHoareTripleChecker+Valid, 15939 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:13,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2343 Valid, 15939 Invalid, 1214 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [60 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 08:06:13,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10692 states. [2023-11-19 08:06:13,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10692 to 8042. [2023-11-19 08:06:13,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8042 states, 8036 states have (on average 1.2682926829268293) internal successors, (10192), 8040 states have internal predecessors, (10192), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:13,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8042 states to 8042 states and 10197 transitions. [2023-11-19 08:06:13,631 INFO L78 Accepts]: Start accepts. Automaton has 8042 states and 10197 transitions. Word has length 366 [2023-11-19 08:06:13,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:13,632 INFO L495 AbstractCegarLoop]: Abstraction has 8042 states and 10197 transitions. [2023-11-19 08:06:13,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 27.53846153846154) internal successors, (358), 13 states have internal predecessors, (358), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:13,632 INFO L276 IsEmpty]: Start isEmpty. Operand 8042 states and 10197 transitions. [2023-11-19 08:06:13,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-11-19 08:06:13,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:13,643 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 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 08:06:13,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-19 08:06:13,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-19 08:06:13,861 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:13,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:13,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1341756700, now seen corresponding path program 1 times [2023-11-19 08:06:13,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:13,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006466062] [2023-11-19 08:06:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:13,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 543 proven. 305 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 08:06:14,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:14,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006466062] [2023-11-19 08:06:14,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006466062] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:14,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155625976] [2023-11-19 08:06:14,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:14,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:14,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:14,633 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:14,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:06:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:14,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 08:06:14,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 848 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 08:06:15,449 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:06:15,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155625976] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:15,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:06:15,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 13 [2023-11-19 08:06:15,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791388924] [2023-11-19 08:06:15,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:15,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 08:06:15,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:15,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 08:06:15,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:06:15,453 INFO L87 Difference]: Start difference. First operand 8042 states and 10197 transitions. Second operand has 11 states, 11 states have (on average 41.63636363636363) internal successors, (458), 11 states have internal predecessors, (458), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:16,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:16,520 INFO L93 Difference]: Finished difference Result 18057 states and 22790 transitions. [2023-11-19 08:06:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 08:06:16,520 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 41.63636363636363) internal successors, (458), 11 states have internal predecessors, (458), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 468 [2023-11-19 08:06:16,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:16,542 INFO L225 Difference]: With dead ends: 18057 [2023-11-19 08:06:16,542 INFO L226 Difference]: Without dead ends: 10184 [2023-11-19 08:06:16,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2023-11-19 08:06:16,551 INFO L413 NwaCegarLoop]: 1495 mSDtfsCounter, 2147 mSDsluCounter, 5896 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2147 SdHoareTripleChecker+Valid, 7391 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:16,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2147 Valid, 7391 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:06:16,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10184 states. [2023-11-19 08:06:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10184 to 7911. [2023-11-19 08:06:16,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7911 states, 7905 states have (on average 1.267046173308033) internal successors, (10016), 7909 states have internal predecessors, (10016), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7911 states to 7911 states and 10021 transitions. [2023-11-19 08:06:16,997 INFO L78 Accepts]: Start accepts. Automaton has 7911 states and 10021 transitions. Word has length 468 [2023-11-19 08:06:16,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:16,998 INFO L495 AbstractCegarLoop]: Abstraction has 7911 states and 10021 transitions. [2023-11-19 08:06:16,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 41.63636363636363) internal successors, (458), 11 states have internal predecessors, (458), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:16,999 INFO L276 IsEmpty]: Start isEmpty. Operand 7911 states and 10021 transitions. [2023-11-19 08:06:17,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2023-11-19 08:06:17,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:17,012 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:17,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:17,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-19 08:06:17,225 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:17,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:17,226 INFO L85 PathProgramCache]: Analyzing trace with hash 282578174, now seen corresponding path program 1 times [2023-11-19 08:06:17,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:17,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485291953] [2023-11-19 08:06:17,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:17,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2023-11-19 08:06:17,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:17,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485291953] [2023-11-19 08:06:17,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485291953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:17,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:17,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:06:17,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861894617] [2023-11-19 08:06:17,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:17,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:17,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:17,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:17,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:17,409 INFO L87 Difference]: Start difference. First operand 7911 states and 10021 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:17,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:17,650 INFO L93 Difference]: Finished difference Result 9564 states and 11908 transitions. [2023-11-19 08:06:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:17,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 469 [2023-11-19 08:06:17,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:17,656 INFO L225 Difference]: With dead ends: 9564 [2023-11-19 08:06:17,656 INFO L226 Difference]: Without dead ends: 1706 [2023-11-19 08:06:17,661 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 08:06:17,663 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 138 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:17,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 404 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:06:17,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2023-11-19 08:06:17,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1703. [2023-11-19 08:06:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1699 states have (on average 1.100058858151854) internal successors, (1869), 1701 states have internal predecessors, (1869), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 1872 transitions. [2023-11-19 08:06:17,765 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 1872 transitions. Word has length 469 [2023-11-19 08:06:17,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:17,766 INFO L495 AbstractCegarLoop]: Abstraction has 1703 states and 1872 transitions. [2023-11-19 08:06:17,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:17,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 1872 transitions. [2023-11-19 08:06:17,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-19 08:06:17,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:17,771 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:17,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-19 08:06:17,772 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:17,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:17,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1243077896, now seen corresponding path program 1 times [2023-11-19 08:06:17,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:17,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498912636] [2023-11-19 08:06:17,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:17,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2023-11-19 08:06:18,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:18,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498912636] [2023-11-19 08:06:18,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498912636] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:18,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:18,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 08:06:18,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520995201] [2023-11-19 08:06:18,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:18,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:06:18,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:18,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:06:18,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:06:18,203 INFO L87 Difference]: Start difference. First operand 1703 states and 1872 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:18,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:18,447 INFO L93 Difference]: Finished difference Result 2442 states and 2703 transitions. [2023-11-19 08:06:18,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 08:06:18,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 470 [2023-11-19 08:06:18,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:18,456 INFO L225 Difference]: With dead ends: 2442 [2023-11-19 08:06:18,456 INFO L226 Difference]: Without dead ends: 1725 [2023-11-19 08:06:18,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:06:18,457 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 238 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:18,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 1517 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:06:18,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2023-11-19 08:06:18,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1697. [2023-11-19 08:06:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1693 states have (on average 1.0956881275841701) internal successors, (1855), 1695 states have internal predecessors, (1855), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:18,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 1858 transitions. [2023-11-19 08:06:18,561 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 1858 transitions. Word has length 470 [2023-11-19 08:06:18,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:18,562 INFO L495 AbstractCegarLoop]: Abstraction has 1697 states and 1858 transitions. [2023-11-19 08:06:18,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:18,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 1858 transitions. [2023-11-19 08:06:18,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-19 08:06:18,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:18,568 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:18,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-19 08:06:18,568 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:18,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:18,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1382591989, now seen corresponding path program 1 times [2023-11-19 08:06:18,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:18,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129351695] [2023-11-19 08:06:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:18,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2023-11-19 08:06:18,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:18,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129351695] [2023-11-19 08:06:18,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129351695] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:18,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:18,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:06:18,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742754782] [2023-11-19 08:06:18,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:18,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:06:18,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:18,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:06:18,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:06:18,833 INFO L87 Difference]: Start difference. First operand 1697 states and 1858 transitions. Second operand has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:18,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:18,964 INFO L93 Difference]: Finished difference Result 2383 states and 2607 transitions. [2023-11-19 08:06:18,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:06:18,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 471 [2023-11-19 08:06:18,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:18,969 INFO L225 Difference]: With dead ends: 2383 [2023-11-19 08:06:18,969 INFO L226 Difference]: Without dead ends: 1664 [2023-11-19 08:06:18,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:06:18,971 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 188 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:18,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 875 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:18,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2023-11-19 08:06:19,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1648. [2023-11-19 08:06:19,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1645 states have (on average 1.0693009118541033) internal successors, (1759), 1646 states have internal predecessors, (1759), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:19,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 1761 transitions. [2023-11-19 08:06:19,073 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 1761 transitions. Word has length 471 [2023-11-19 08:06:19,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:19,074 INFO L495 AbstractCegarLoop]: Abstraction has 1648 states and 1761 transitions. [2023-11-19 08:06:19,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:19,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 1761 transitions. [2023-11-19 08:06:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2023-11-19 08:06:19,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:19,080 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:19,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-19 08:06:19,081 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:19,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:19,081 INFO L85 PathProgramCache]: Analyzing trace with hash 281790686, now seen corresponding path program 1 times [2023-11-19 08:06:19,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:19,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914765337] [2023-11-19 08:06:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:19,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 94 proven. 316 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2023-11-19 08:06:21,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:21,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914765337] [2023-11-19 08:06:21,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914765337] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:21,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769135803] [2023-11-19 08:06:21,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:21,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:21,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:21,456 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:21,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:06:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:21,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 08:06:21,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 96 proven. 263 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2023-11-19 08:06:22,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 25 proven. 334 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2023-11-19 08:06:23,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769135803] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:23,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:23,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 30 [2023-11-19 08:06:23,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550140896] [2023-11-19 08:06:23,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:23,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-19 08:06:23,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:23,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-19 08:06:23,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2023-11-19 08:06:23,509 INFO L87 Difference]: Start difference. First operand 1648 states and 1761 transitions. Second operand has 30 states, 30 states have (on average 13.933333333333334) internal successors, (418), 30 states have internal predecessors, (418), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:24,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:24,380 INFO L93 Difference]: Finished difference Result 1666 states and 1778 transitions. [2023-11-19 08:06:24,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-19 08:06:24,381 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 13.933333333333334) internal successors, (418), 30 states have internal predecessors, (418), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 528 [2023-11-19 08:06:24,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:24,386 INFO L225 Difference]: With dead ends: 1666 [2023-11-19 08:06:24,387 INFO L226 Difference]: Without dead ends: 1663 [2023-11-19 08:06:24,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1092 GetRequests, 1047 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=1929, Unknown=0, NotChecked=0, Total=2162 [2023-11-19 08:06:24,389 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 777 mSDsluCounter, 8449 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 8846 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:24,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 8846 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:06:24,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2023-11-19 08:06:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1648. [2023-11-19 08:06:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1645 states have (on average 1.068693009118541) internal successors, (1758), 1646 states have internal predecessors, (1758), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 1760 transitions. [2023-11-19 08:06:24,492 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 1760 transitions. Word has length 528 [2023-11-19 08:06:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:24,493 INFO L495 AbstractCegarLoop]: Abstraction has 1648 states and 1760 transitions. [2023-11-19 08:06:24,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 13.933333333333334) internal successors, (418), 30 states have internal predecessors, (418), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 1760 transitions. [2023-11-19 08:06:24,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2023-11-19 08:06:24,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:24,501 INFO L195 NwaCegarLoop]: trace histogram [11, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:24,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:24,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-19 08:06:24,721 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:24,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:24,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1226769046, now seen corresponding path program 1 times [2023-11-19 08:06:24,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:24,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332208577] [2023-11-19 08:06:24,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:24,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 281 proven. 48 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2023-11-19 08:06:25,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:25,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332208577] [2023-11-19 08:06:25,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332208577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:25,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595988839] [2023-11-19 08:06:25,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:25,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:25,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:25,553 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:25,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c9bdb6c-500c-4a27-ad1e-ea80d68d3856/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:06:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:25,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 1574 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 08:06:25,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 281 proven. 48 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2023-11-19 08:06:26,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 281 proven. 48 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2023-11-19 08:06:26,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595988839] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:26,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:26,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2023-11-19 08:06:26,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037928034] [2023-11-19 08:06:26,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:26,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 08:06:26,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:26,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 08:06:26,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:06:26,268 INFO L87 Difference]: Start difference. First operand 1648 states and 1760 transitions. Second operand has 9 states, 9 states have (on average 31.22222222222222) internal successors, (281), 9 states have internal predecessors, (281), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)