./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/xor4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/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_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/xor4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/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_12053fe9-fff6-4b00-8b21-6d00b97b9811/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 90b7e6947bda838aad0c5e01877b9a712c46c1a2dc1a2af9f1fb1c6266593b6a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:44:06,968 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:44:07,103 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:44:07,112 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:44:07,114 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:44:07,154 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:44:07,155 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:44:07,156 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:44:07,157 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:44:07,162 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:44:07,164 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:44:07,165 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:44:07,165 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:44:07,167 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:44:07,168 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:44:07,168 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:44:07,169 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:44:07,169 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:44:07,170 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:44:07,170 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:44:07,170 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:44:07,172 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:44:07,173 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:44:07,173 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:44:07,174 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:44:07,175 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:44:07,175 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:44:07,176 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:44:07,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:44:07,177 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:44:07,178 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:44:07,178 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:44:07,178 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:44:07,179 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:44:07,179 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:44:07,179 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:44:07,179 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:44:07,180 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:44:07,180 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:44:07,180 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_12053fe9-fff6-4b00-8b21-6d00b97b9811/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90b7e6947bda838aad0c5e01877b9a712c46c1a2dc1a2af9f1fb1c6266593b6a [2023-11-19 07:44:07,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:44:07,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:44:07,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:44:07,577 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:44:07,578 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:44:07,579 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/array-crafted/xor4.i [2023-11-19 07:44:10,900 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:44:11,149 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:44:11,150 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/sv-benchmarks/c/array-crafted/xor4.i [2023-11-19 07:44:11,159 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/data/d75994eba/c099bb12f52e4b8085c08701197ec479/FLAG8e8b08dc6 [2023-11-19 07:44:11,177 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/data/d75994eba/c099bb12f52e4b8085c08701197ec479 [2023-11-19 07:44:11,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:44:11,191 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:44:11,195 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:11,195 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:44:11,202 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:44:11,218 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:11" (1/1) ... [2023-11-19 07:44:11,220 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e87cb9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:11, skipping insertion in model container [2023-11-19 07:44:11,220 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:11" (1/1) ... [2023-11-19 07:44:11,248 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:44:11,449 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_12053fe9-fff6-4b00-8b21-6d00b97b9811/sv-benchmarks/c/array-crafted/xor4.i[1303,1316] [2023-11-19 07:44:11,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:11,467 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:44:11,515 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_12053fe9-fff6-4b00-8b21-6d00b97b9811/sv-benchmarks/c/array-crafted/xor4.i[1303,1316] [2023-11-19 07:44:11,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:11,533 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:44:11,534 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:11 WrapperNode [2023-11-19 07:44:11,534 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:11,535 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:11,536 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:44:11,541 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:44:11,550 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:11" (1/1) ... [2023-11-19 07:44:11,573 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:11" (1/1) ... [2023-11-19 07:44:11,599 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 76 [2023-11-19 07:44:11,600 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:11,601 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:44:11,601 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:44:11,601 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:44:11,610 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:11" (1/1) ... [2023-11-19 07:44:11,610 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:11" (1/1) ... [2023-11-19 07:44:11,613 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:11" (1/1) ... [2023-11-19 07:44:11,613 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:11" (1/1) ... [2023-11-19 07:44:11,620 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:11" (1/1) ... [2023-11-19 07:44:11,633 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:11" (1/1) ... [2023-11-19 07:44:11,635 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:11" (1/1) ... [2023-11-19 07:44:11,636 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:11" (1/1) ... [2023-11-19 07:44:11,639 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:44:11,640 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:44:11,640 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:44:11,640 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:44:11,641 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:11" (1/1) ... [2023-11-19 07:44:11,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:44:11,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:11,688 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:11,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:44:11,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:44:11,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:44:11,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:44:11,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:44:11,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:44:11,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:44:11,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:44:11,742 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2023-11-19 07:44:11,742 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2023-11-19 07:44:11,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:44:11,827 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:44:11,830 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:44:12,037 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:44:12,058 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:44:12,060 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:44:12,065 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:12 BoogieIcfgContainer [2023-11-19 07:44:12,065 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:44:12,069 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:44:12,070 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:44:12,074 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:44:12,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:44:11" (1/3) ... [2023-11-19 07:44:12,076 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f555929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:12, skipping insertion in model container [2023-11-19 07:44:12,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:11" (2/3) ... [2023-11-19 07:44:12,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f555929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:12, skipping insertion in model container [2023-11-19 07:44:12,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:12" (3/3) ... [2023-11-19 07:44:12,082 INFO L112 eAbstractionObserver]: Analyzing ICFG xor4.i [2023-11-19 07:44:12,107 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:44:12,107 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:44:12,181 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:44:12,190 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;@2c68a11d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:44:12,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:44:12,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:44:12,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 07:44:12,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:12,215 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:12,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:12,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:12,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1281058140, now seen corresponding path program 1 times [2023-11-19 07:44:12,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:12,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502833187] [2023-11-19 07:44:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:12,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:12,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:44:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:12,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-19 07:44:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:12,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-19 07:44:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 07:44:12,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:12,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502833187] [2023-11-19 07:44:12,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502833187] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:12,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296662240] [2023-11-19 07:44:12,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:12,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:12,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:12,815 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:12,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:44:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:12,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:44:12,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:44:13,028 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:13,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296662240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:13,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:44:13,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2023-11-19 07:44:13,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427532554] [2023-11-19 07:44:13,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:13,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:44:13,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:13,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:44:13,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:44:13,070 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:44:13,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:13,090 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2023-11-19 07:44:13,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:44:13,092 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-11-19 07:44:13,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:13,099 INFO L225 Difference]: With dead ends: 58 [2023-11-19 07:44:13,099 INFO L226 Difference]: Without dead ends: 27 [2023-11-19 07:44:13,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:44:13,107 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:13,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:13,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-19 07:44:13,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-19 07:44:13,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:44:13,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2023-11-19 07:44:13,153 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 29 [2023-11-19 07:44:13,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:13,155 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2023-11-19 07:44:13,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:44:13,156 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2023-11-19 07:44:13,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 07:44:13,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:13,159 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:13,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:13,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:13,381 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:13,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:13,382 INFO L85 PathProgramCache]: Analyzing trace with hash -822135594, now seen corresponding path program 1 times [2023-11-19 07:44:13,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:13,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118602608] [2023-11-19 07:44:13,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:13,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:13,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:44:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:13,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-19 07:44:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:13,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-19 07:44:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 07:44:13,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:13,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118602608] [2023-11-19 07:44:13,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118602608] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:13,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706037284] [2023-11-19 07:44:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:13,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:13,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:13,642 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:13,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:44:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:13,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:44:13,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:44:13,760 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:13,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706037284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:13,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:44:13,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 07:44:13,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983311126] [2023-11-19 07:44:13,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:13,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:13,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:13,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:13,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:44:13,764 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:44:13,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:13,782 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2023-11-19 07:44:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:13,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-11-19 07:44:13,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:13,784 INFO L225 Difference]: With dead ends: 52 [2023-11-19 07:44:13,784 INFO L226 Difference]: Without dead ends: 29 [2023-11-19 07:44:13,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:44:13,787 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:13,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 61 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:13,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-19 07:44:13,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-11-19 07:44:13,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:44:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-11-19 07:44:13,797 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 29 [2023-11-19 07:44:13,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:13,797 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-11-19 07:44:13,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:44:13,798 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-11-19 07:44:13,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 07:44:13,799 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:13,800 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:13,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:14,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:14,021 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:14,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:14,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1562728212, now seen corresponding path program 1 times [2023-11-19 07:44:14,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:14,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337839822] [2023-11-19 07:44:14,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:14,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:14,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:44:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:14,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:44:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:14,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-19 07:44:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:44:14,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:14,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337839822] [2023-11-19 07:44:14,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337839822] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:14,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388832062] [2023-11-19 07:44:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:14,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:14,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:14,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:14,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:44:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:14,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:44:14,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 07:44:14,388 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:14,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388832062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:14,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:44:14,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 07:44:14,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696225068] [2023-11-19 07:44:14,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:14,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:14,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:14,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:14,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:44:14,393 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:44:14,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:14,408 INFO L93 Difference]: Finished difference Result 55 states and 74 transitions. [2023-11-19 07:44:14,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:14,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-11-19 07:44:14,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:14,411 INFO L225 Difference]: With dead ends: 55 [2023-11-19 07:44:14,411 INFO L226 Difference]: Without dead ends: 34 [2023-11-19 07:44:14,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:44:14,414 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:14,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 62 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:14,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-19 07:44:14,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2023-11-19 07:44:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:44:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-11-19 07:44:14,423 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 31 [2023-11-19 07:44:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:14,424 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-11-19 07:44:14,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:44:14,424 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-11-19 07:44:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 07:44:14,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:14,427 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:14,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:14,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:14,629 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:14,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:14,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1573441105, now seen corresponding path program 1 times [2023-11-19 07:44:14,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:14,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815511229] [2023-11-19 07:44:14,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:14,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:14,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:44:14,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:14,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-19 07:44:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:14,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-19 07:44:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:44:14,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:14,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815511229] [2023-11-19 07:44:14,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815511229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:14,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151375590] [2023-11-19 07:44:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:14,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:14,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:14,845 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:14,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:44:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:14,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:44:14,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:44:15,012 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:15,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151375590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:15,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:44:15,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 07:44:15,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208777227] [2023-11-19 07:44:15,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:15,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:15,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:15,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:15,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:44:15,015 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:44:15,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:15,041 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2023-11-19 07:44:15,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:15,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2023-11-19 07:44:15,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:15,047 INFO L225 Difference]: With dead ends: 48 [2023-11-19 07:44:15,047 INFO L226 Difference]: Without dead ends: 31 [2023-11-19 07:44:15,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:44:15,049 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:15,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-19 07:44:15,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-11-19 07:44:15,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:44:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-11-19 07:44:15,056 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 43 [2023-11-19 07:44:15,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:15,057 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-11-19 07:44:15,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:44:15,063 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-11-19 07:44:15,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 07:44:15,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:15,068 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:15,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:15,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:15,290 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:15,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:15,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1108099501, now seen corresponding path program 1 times [2023-11-19 07:44:15,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:15,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522326068] [2023-11-19 07:44:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:15,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:15,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:44:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:15,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-19 07:44:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:15,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-19 07:44:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 07:44:15,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:15,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522326068] [2023-11-19 07:44:15,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522326068] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:15,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468507002] [2023-11-19 07:44:15,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:15,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:15,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:15,491 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:15,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:44:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:15,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:44:15,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-19 07:44:15,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-19 07:44:15,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468507002] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:15,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:15,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-11-19 07:44:15,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741682381] [2023-11-19 07:44:15,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:15,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:44:15,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:15,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:44:15,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:44:15,703 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 07:44:15,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:15,792 INFO L93 Difference]: Finished difference Result 72 states and 98 transitions. [2023-11-19 07:44:15,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:44:15,793 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 45 [2023-11-19 07:44:15,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:15,796 INFO L225 Difference]: With dead ends: 72 [2023-11-19 07:44:15,796 INFO L226 Difference]: Without dead ends: 47 [2023-11-19 07:44:15,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:44:15,803 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 146 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 07:44:15,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 146 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:15,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-19 07:44:15,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2023-11-19 07:44:15,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:44:15,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2023-11-19 07:44:15,811 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 45 [2023-11-19 07:44:15,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:15,812 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2023-11-19 07:44:15,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 07:44:15,812 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2023-11-19 07:44:15,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 07:44:15,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:15,819 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:15,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:16,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:16,041 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:16,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:16,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1898108414, now seen corresponding path program 2 times [2023-11-19 07:44:16,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:16,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307235036] [2023-11-19 07:44:16,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:16,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:16,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-19 07:44:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:16,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-19 07:44:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:16,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-19 07:44:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-19 07:44:16,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:16,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307235036] [2023-11-19 07:44:16,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307235036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:16,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143675283] [2023-11-19 07:44:16,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:44:16,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:16,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:16,210 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:16,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:44:16,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:44:16,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:16,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:44:16,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-19 07:44:16,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-19 07:44:16,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143675283] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:16,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:16,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-11-19 07:44:16,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663598098] [2023-11-19 07:44:16,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:16,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:44:16,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:16,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:44:16,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:44:16,524 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 07:44:16,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:16,624 INFO L93 Difference]: Finished difference Result 88 states and 114 transitions. [2023-11-19 07:44:16,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:44:16,627 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2023-11-19 07:44:16,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:16,630 INFO L225 Difference]: With dead ends: 88 [2023-11-19 07:44:16,631 INFO L226 Difference]: Without dead ends: 57 [2023-11-19 07:44:16,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:44:16,637 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:16,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 164 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:16,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-19 07:44:16,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-11-19 07:44:16,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:44:16,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2023-11-19 07:44:16,652 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 63 [2023-11-19 07:44:16,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:16,652 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2023-11-19 07:44:16,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 07:44:16,653 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2023-11-19 07:44:16,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-19 07:44:16,654 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:16,654 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:16,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:16,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:16,855 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:16,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:16,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1166579724, now seen corresponding path program 3 times [2023-11-19 07:44:16,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:16,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978966253] [2023-11-19 07:44:16,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:16,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:16,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-19 07:44:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:17,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-19 07:44:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:17,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-19 07:44:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-11-19 07:44:17,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:17,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978966253] [2023-11-19 07:44:17,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978966253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:17,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199362695] [2023-11-19 07:44:17,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:44:17,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:17,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:17,037 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:17,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:44:17,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:44:17,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:17,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:44:17,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-11-19 07:44:17,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-11-19 07:44:17,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199362695] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:17,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:17,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-19 07:44:17,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012476395] [2023-11-19 07:44:17,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:17,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:44:17,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:17,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:44:17,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:44:17,261 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:44:17,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:17,307 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2023-11-19 07:44:17,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:44:17,308 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 77 [2023-11-19 07:44:17,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:17,310 INFO L225 Difference]: With dead ends: 111 [2023-11-19 07:44:17,310 INFO L226 Difference]: Without dead ends: 80 [2023-11-19 07:44:17,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:44:17,313 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 61 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:17,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 90 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:17,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-19 07:44:17,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-11-19 07:44:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.28) internal successors, (96), 75 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:44:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2023-11-19 07:44:17,344 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 77 [2023-11-19 07:44:17,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:17,347 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2023-11-19 07:44:17,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:44:17,347 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2023-11-19 07:44:17,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-19 07:44:17,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:17,353 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:17,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:17,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:44:17,575 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:17,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:17,576 INFO L85 PathProgramCache]: Analyzing trace with hash 454582112, now seen corresponding path program 4 times [2023-11-19 07:44:17,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:17,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127957073] [2023-11-19 07:44:17,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:17,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:17,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-19 07:44:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:17,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-19 07:44:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:17,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-19 07:44:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-11-19 07:44:18,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:18,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127957073] [2023-11-19 07:44:18,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127957073] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:18,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706036062] [2023-11-19 07:44:18,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:44:18,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:18,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:18,019 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:18,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:44:18,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:44:18,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:18,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:44:18,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-11-19 07:44:18,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-11-19 07:44:18,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706036062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:18,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:18,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-19 07:44:18,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115783026] [2023-11-19 07:44:18,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:18,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 07:44:18,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:18,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 07:44:18,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:44:18,564 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 07:44:18,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:18,658 INFO L93 Difference]: Finished difference Result 161 states and 216 transitions. [2023-11-19 07:44:18,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:44:18,659 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2023-11-19 07:44:18,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:18,661 INFO L225 Difference]: With dead ends: 161 [2023-11-19 07:44:18,661 INFO L226 Difference]: Without dead ends: 104 [2023-11-19 07:44:18,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:44:18,666 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:18,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 148 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:18,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-19 07:44:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-11-19 07:44:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:44:18,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 126 transitions. [2023-11-19 07:44:18,699 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 126 transitions. Word has length 125 [2023-11-19 07:44:18,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:18,705 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 126 transitions. [2023-11-19 07:44:18,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 07:44:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 126 transitions. [2023-11-19 07:44:18,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-19 07:44:18,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:18,708 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 18, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:18,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:18,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:18,909 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:18,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:18,909 INFO L85 PathProgramCache]: Analyzing trace with hash 251431752, now seen corresponding path program 5 times [2023-11-19 07:44:18,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:18,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984162187] [2023-11-19 07:44:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:18,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:19,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-19 07:44:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:19,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-19 07:44:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:19,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-11-19 07:44:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-11-19 07:44:19,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:19,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984162187] [2023-11-19 07:44:19,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984162187] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:19,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063286841] [2023-11-19 07:44:19,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:44:19,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:19,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:19,896 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:19,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:44:23,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-11-19 07:44:23,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:23,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:44:23,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2023-11-19 07:44:23,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2023-11-19 07:44:23,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063286841] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:23,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:23,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2023-11-19 07:44:23,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935649774] [2023-11-19 07:44:23,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:23,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-19 07:44:23,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:23,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-19 07:44:23,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2023-11-19 07:44:23,588 INFO L87 Difference]: Start difference. First operand 104 states and 126 transitions. Second operand has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:44:23,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:23,742 INFO L93 Difference]: Finished difference Result 212 states and 291 transitions. [2023-11-19 07:44:23,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-19 07:44:23,743 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 149 [2023-11-19 07:44:23,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:23,744 INFO L225 Difference]: With dead ends: 212 [2023-11-19 07:44:23,745 INFO L226 Difference]: Without dead ends: 155 [2023-11-19 07:44:23,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2023-11-19 07:44:23,747 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 172 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:23,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 319 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:23,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-19 07:44:23,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2023-11-19 07:44:23,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.3020134228187918) internal successors, (194), 149 states have internal predecessors, (194), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:44:23,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 200 transitions. [2023-11-19 07:44:23,758 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 200 transitions. Word has length 149 [2023-11-19 07:44:23,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:23,759 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 200 transitions. [2023-11-19 07:44:23,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:44:23,759 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 200 transitions. [2023-11-19 07:44:23,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-11-19 07:44:23,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:23,763 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 23, 23, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:23,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:23,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:23,986 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:23,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:23,986 INFO L85 PathProgramCache]: Analyzing trace with hash 432175710, now seen corresponding path program 6 times [2023-11-19 07:44:23,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:23,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288180793] [2023-11-19 07:44:23,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:23,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:25,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-19 07:44:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:25,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2023-11-19 07:44:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:25,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2023-11-19 07:44:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3589 trivial. 0 not checked. [2023-11-19 07:44:25,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:25,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288180793] [2023-11-19 07:44:25,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288180793] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:25,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974723157] [2023-11-19 07:44:25,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:44:25,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:25,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:25,141 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:25,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:44:25,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-19 07:44:25,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:25,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:44:25,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1634 proven. 4 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2023-11-19 07:44:25,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4114 trivial. 0 not checked. [2023-11-19 07:44:25,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974723157] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:25,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:25,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 5, 5] total 32 [2023-11-19 07:44:25,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751566420] [2023-11-19 07:44:25,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:25,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-19 07:44:25,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:25,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-19 07:44:25,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2023-11-19 07:44:25,476 INFO L87 Difference]: Start difference. First operand 154 states and 200 transitions. Second operand has 32 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:44:25,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:25,594 INFO L93 Difference]: Finished difference Result 270 states and 366 transitions. [2023-11-19 07:44:25,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-19 07:44:25,595 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 247 [2023-11-19 07:44:25,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:25,596 INFO L225 Difference]: With dead ends: 270 [2023-11-19 07:44:25,596 INFO L226 Difference]: Without dead ends: 165 [2023-11-19 07:44:25,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2023-11-19 07:44:25,599 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:25,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 216 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:25,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-19 07:44:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2023-11-19 07:44:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.2830188679245282) internal successors, (204), 159 states have internal predecessors, (204), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:44:25,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 210 transitions. [2023-11-19 07:44:25,612 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 210 transitions. Word has length 247 [2023-11-19 07:44:25,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:25,613 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 210 transitions. [2023-11-19 07:44:25,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:44:25,613 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 210 transitions. [2023-11-19 07:44:25,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-11-19 07:44:25,617 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:25,617 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 24, 24, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:25,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:25,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:44:25,839 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:25,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:25,839 INFO L85 PathProgramCache]: Analyzing trace with hash -399469548, now seen corresponding path program 7 times [2023-11-19 07:44:25,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:25,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19862349] [2023-11-19 07:44:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:25,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:26,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-19 07:44:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:26,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2023-11-19 07:44:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:27,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2023-11-19 07:44:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-19 07:44:27,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:27,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19862349] [2023-11-19 07:44:27,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19862349] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:27,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325743330] [2023-11-19 07:44:27,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:44:27,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:27,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:27,044 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:27,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:44:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:27,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 07:44:27,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-19 07:44:27,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-19 07:44:28,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325743330] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:28,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:28,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-11-19 07:44:28,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820411561] [2023-11-19 07:44:28,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:28,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-19 07:44:28,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:28,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-19 07:44:28,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-11-19 07:44:28,668 INFO L87 Difference]: Start difference. First operand 164 states and 210 transitions. Second operand has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 07:44:28,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:28,882 INFO L93 Difference]: Finished difference Result 329 states and 446 transitions. [2023-11-19 07:44:28,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-19 07:44:28,883 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 257 [2023-11-19 07:44:28,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:28,885 INFO L225 Difference]: With dead ends: 329 [2023-11-19 07:44:28,886 INFO L226 Difference]: Without dead ends: 216 [2023-11-19 07:44:28,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-11-19 07:44:28,889 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:28,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 148 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:44:28,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-19 07:44:28,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2023-11-19 07:44:28,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.2132701421800949) internal successors, (256), 211 states have internal predecessors, (256), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:44:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 262 transitions. [2023-11-19 07:44:28,902 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 262 transitions. Word has length 257 [2023-11-19 07:44:28,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:28,902 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 262 transitions. [2023-11-19 07:44:28,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 07:44:28,903 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 262 transitions. [2023-11-19 07:44:28,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-19 07:44:28,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:28,909 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:28,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:29,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:29,126 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:29,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:29,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1831150304, now seen corresponding path program 8 times [2023-11-19 07:44:29,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:29,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351243044] [2023-11-19 07:44:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:29,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:32,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-11-19 07:44:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:32,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2023-11-19 07:44:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:32,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2023-11-19 07:44:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-19 07:44:32,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:32,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351243044] [2023-11-19 07:44:32,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351243044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:32,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452351700] [2023-11-19 07:44:32,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:44:32,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:32,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:32,502 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:32,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:44:32,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:44:32,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:32,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-19 07:44:32,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-19 07:44:33,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-19 07:44:37,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452351700] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:37,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:37,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2023-11-19 07:44:37,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573268078] [2023-11-19 07:44:37,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:37,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-11-19 07:44:37,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:37,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-11-19 07:44:37,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2023-11-19 07:44:37,196 INFO L87 Difference]: Start difference. First operand 216 states and 262 transitions. Second operand has 105 states, 105 states have (on average 2.2285714285714286) internal successors, (234), 105 states have internal predecessors, (234), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 07:44:37,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:37,681 INFO L93 Difference]: Finished difference Result 433 states and 576 transitions. [2023-11-19 07:44:37,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-11-19 07:44:37,682 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.2285714285714286) internal successors, (234), 105 states have internal predecessors, (234), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 309 [2023-11-19 07:44:37,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:37,686 INFO L225 Difference]: With dead ends: 433 [2023-11-19 07:44:37,686 INFO L226 Difference]: Without dead ends: 320 [2023-11-19 07:44:37,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2023-11-19 07:44:37,692 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:37,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 235 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:44:37,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-11-19 07:44:37,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2023-11-19 07:44:37,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.1428571428571428) internal successors, (360), 315 states have internal predecessors, (360), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:44:37,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 366 transitions. [2023-11-19 07:44:37,710 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 366 transitions. Word has length 309 [2023-11-19 07:44:37,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:37,711 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 366 transitions. [2023-11-19 07:44:37,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.2285714285714286) internal successors, (234), 105 states have internal predecessors, (234), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 07:44:37,711 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 366 transitions. [2023-11-19 07:44:37,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2023-11-19 07:44:37,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:37,720 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:37,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:37,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:37,934 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:37,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:37,934 INFO L85 PathProgramCache]: Analyzing trace with hash 650679928, now seen corresponding path program 9 times [2023-11-19 07:44:37,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:37,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16212088] [2023-11-19 07:44:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:37,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:47,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-11-19 07:44:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:47,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2023-11-19 07:44:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:47,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2023-11-19 07:44:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-19 07:44:47,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:47,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16212088] [2023-11-19 07:44:47,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16212088] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:47,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795526953] [2023-11-19 07:44:47,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:44:47,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:47,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:47,434 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:47,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:44:47,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-19 07:44:47,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:47,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:44:47,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 1634 proven. 36 refuted. 0 times theorem prover too weak. 12355 trivial. 0 not checked. [2023-11-19 07:44:48,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13989 trivial. 0 not checked. [2023-11-19 07:44:48,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795526953] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:48,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:48,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 9, 9] total 119 [2023-11-19 07:44:48,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093947851] [2023-11-19 07:44:48,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:48,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2023-11-19 07:44:48,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:48,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2023-11-19 07:44:48,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5579, Invalid=8463, Unknown=0, NotChecked=0, Total=14042 [2023-11-19 07:44:48,696 INFO L87 Difference]: Start difference. First operand 320 states and 366 transitions. Second operand has 119 states, 119 states have (on average 2.2436974789915967) internal successors, (267), 119 states have internal predecessors, (267), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:44:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:49,239 INFO L93 Difference]: Finished difference Result 452 states and 552 transitions. [2023-11-19 07:44:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-11-19 07:44:49,240 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.2436974789915967) internal successors, (267), 119 states have internal predecessors, (267), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 413 [2023-11-19 07:44:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:49,242 INFO L225 Difference]: With dead ends: 452 [2023-11-19 07:44:49,242 INFO L226 Difference]: Without dead ends: 339 [2023-11-19 07:44:49,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5579, Invalid=8463, Unknown=0, NotChecked=0, Total=14042 [2023-11-19 07:44:49,249 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:49,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 190 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:44:49,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-11-19 07:44:49,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 338. [2023-11-19 07:44:49,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 333 states have (on average 1.135135135135135) internal successors, (378), 333 states have internal predecessors, (378), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:44:49,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 384 transitions. [2023-11-19 07:44:49,264 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 384 transitions. Word has length 413 [2023-11-19 07:44:49,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:49,265 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 384 transitions. [2023-11-19 07:44:49,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.2436974789915967) internal successors, (267), 119 states have internal predecessors, (267), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:44:49,266 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 384 transitions. [2023-11-19 07:44:49,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2023-11-19 07:44:49,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:49,275 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 42, 42, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:49,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:49,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12053fe9-fff6-4b00-8b21-6d00b97b9811/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:44:49,497 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:49,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:49,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1154965850, now seen corresponding path program 10 times [2023-11-19 07:44:49,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:49,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691373687] [2023-11-19 07:44:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:49,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat