./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c5af94617941f44648ac9498189d5e73562b4cbf6ae0ea00b10262137b50bb0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:07:45,562 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:07:45,720 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:07:45,731 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:07:45,732 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:07:45,790 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:07:45,791 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:07:45,792 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:07:45,793 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:07:45,803 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:07:45,803 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:07:45,805 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:07:45,806 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:07:45,809 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:07:45,809 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:07:45,810 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:07:45,811 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:07:45,811 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:07:45,812 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:07:45,812 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:07:45,815 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:07:45,816 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:07:45,817 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:07:45,818 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:07:45,819 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:07:45,820 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:07:45,820 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:07:45,821 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:07:45,821 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:07:45,822 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:07:45,824 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:07:45,824 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:07:45,825 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:07:45,825 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:07:45,825 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:07:45,826 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:07:45,826 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:07:45,827 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:07:45,827 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:07:45,827 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:07:45,828 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:07:45,828 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:07:45,829 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:07:45,829 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:07:45,830 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:07:45,830 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5af94617941f44648ac9498189d5e73562b4cbf6ae0ea00b10262137b50bb0 [2023-11-19 05:07:46,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:07:46,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:07:46,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:07:46,310 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:07:46,311 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:07:46,314 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c [2023-11-19 05:07:49,896 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:07:50,395 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:07:50,396 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c [2023-11-19 05:07:50,445 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/data/80eefff44/eb505c935952477e895b71934219cc87/FLAG0f4fdcfb1 [2023-11-19 05:07:50,467 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/data/80eefff44/eb505c935952477e895b71934219cc87 [2023-11-19 05:07:50,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:07:50,482 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:07:50,485 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:07:50,485 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:07:50,492 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:07:50,493 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:07:50" (1/1) ... [2023-11-19 05:07:50,494 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a5016f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:50, skipping insertion in model container [2023-11-19 05:07:50,495 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:07:50" (1/1) ... [2023-11-19 05:07:50,608 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:07:51,402 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_e1e0d441-2326-4d3a-b930-12ef3249658e/sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c[48047,48060] [2023-11-19 05:07:51,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:07:51,552 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:07:51,565 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [48] [2023-11-19 05:07:51,568 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Client.i","") [168] [2023-11-19 05:07:51,568 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [754] [2023-11-19 05:07:51,568 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1126] [2023-11-19 05:07:51,570 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Email.i","") [1492] [2023-11-19 05:07:51,570 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"EmailLib.i","") [1698] [2023-11-19 05:07:51,570 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Util.i","") [2095] [2023-11-19 05:07:51,571 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [2112] [2023-11-19 05:07:51,571 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [2378] [2023-11-19 05:07:51,571 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"ClientLib.i","") [2387] [2023-11-19 05:07:51,572 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"DecryptAutoResponder_spec.i","") [3447] [2023-11-19 05:07:51,733 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_e1e0d441-2326-4d3a-b930-12ef3249658e/sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c[48047,48060] [2023-11-19 05:07:51,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:07:51,852 WARN L675 CHandler]: The function puts is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:07:51,861 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:07:51,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:51 WrapperNode [2023-11-19 05:07:51,863 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:07:51,864 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:07:51,864 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:07:51,865 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:07:51,874 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:51" (1/1) ... [2023-11-19 05:07:51,955 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:51" (1/1) ... [2023-11-19 05:07:52,046 INFO L138 Inliner]: procedures = 151, calls = 282, calls flagged for inlining = 67, calls inlined = 64, statements flattened = 1316 [2023-11-19 05:07:52,047 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:07:52,048 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:07:52,048 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:07:52,048 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:07:52,061 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:51" (1/1) ... [2023-11-19 05:07:52,074 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:51" (1/1) ... [2023-11-19 05:07:52,083 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:51" (1/1) ... [2023-11-19 05:07:52,086 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:51" (1/1) ... [2023-11-19 05:07:52,135 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:51" (1/1) ... [2023-11-19 05:07:52,151 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:51" (1/1) ... [2023-11-19 05:07:52,160 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:51" (1/1) ... [2023-11-19 05:07:52,169 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:51" (1/1) ... [2023-11-19 05:07:52,183 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:07:52,184 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:07:52,185 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:07:52,185 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:07:52,186 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:51" (1/1) ... [2023-11-19 05:07:52,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:07:52,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:07:52,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:07:52,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:07:52,290 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2023-11-19 05:07:52,291 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2023-11-19 05:07:52,291 INFO L130 BoogieDeclarations]: Found specification of procedure setup_chuck__before__Keys [2023-11-19 05:07:52,291 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_chuck__before__Keys [2023-11-19 05:07:52,291 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Sign [2023-11-19 05:07:52,292 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Sign [2023-11-19 05:07:52,292 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookSize [2023-11-19 05:07:52,292 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookSize [2023-11-19 05:07:52,292 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2023-11-19 05:07:52,293 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2023-11-19 05:07:52,293 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAddress [2023-11-19 05:07:52,293 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAddress [2023-11-19 05:07:52,293 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2023-11-19 05:07:52,294 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2023-11-19 05:07:52,294 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Verify [2023-11-19 05:07:52,294 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Verify [2023-11-19 05:07:52,294 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2023-11-19 05:07:52,295 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2023-11-19 05:07:52,295 INFO L130 BoogieDeclarations]: Found specification of procedure setup_bob__before__Keys [2023-11-19 05:07:52,295 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_bob__before__Keys [2023-11-19 05:07:52,295 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2023-11-19 05:07:52,295 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2023-11-19 05:07:52,296 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2023-11-19 05:07:52,296 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2023-11-19 05:07:52,296 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2023-11-19 05:07:52,296 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2023-11-19 05:07:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Decrypt [2023-11-19 05:07:52,321 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Decrypt [2023-11-19 05:07:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Encrypt [2023-11-19 05:07:52,321 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Encrypt [2023-11-19 05:07:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2023-11-19 05:07:52,322 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2023-11-19 05:07:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2023-11-19 05:07:52,322 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2023-11-19 05:07:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2023-11-19 05:07:52,322 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2023-11-19 05:07:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2023-11-19 05:07:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Forward [2023-11-19 05:07:52,323 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Forward [2023-11-19 05:07:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2023-11-19 05:07:52,323 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2023-11-19 05:07:52,324 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2023-11-19 05:07:52,324 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2023-11-19 05:07:52,324 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2023-11-19 05:07:52,324 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2023-11-19 05:07:52,324 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable__before__Encrypt [2023-11-19 05:07:52,325 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable__before__Encrypt [2023-11-19 05:07:52,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:07:52,326 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2023-11-19 05:07:52,335 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2023-11-19 05:07:52,337 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2023-11-19 05:07:52,337 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2023-11-19 05:07:52,337 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__AddressBook [2023-11-19 05:07:52,338 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__AddressBook [2023-11-19 05:07:52,338 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Encrypt [2023-11-19 05:07:52,338 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Encrypt [2023-11-19 05:07:52,338 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__AutoResponder [2023-11-19 05:07:52,338 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__AutoResponder [2023-11-19 05:07:52,339 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookSize [2023-11-19 05:07:52,339 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookSize [2023-11-19 05:07:52,339 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2023-11-19 05:07:52,340 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2023-11-19 05:07:52,340 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2023-11-19 05:07:52,340 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2023-11-19 05:07:52,340 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2023-11-19 05:07:52,340 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2023-11-19 05:07:52,341 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2023-11-19 05:07:52,341 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2023-11-19 05:07:52,341 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2023-11-19 05:07:52,341 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2023-11-19 05:07:52,341 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2023-11-19 05:07:52,341 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2023-11-19 05:07:52,342 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rjh__before__Keys [2023-11-19 05:07:52,343 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rjh__before__Keys [2023-11-19 05:07:52,343 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Verify [2023-11-19 05:07:52,343 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Verify [2023-11-19 05:07:52,344 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2023-11-19 05:07:52,344 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2023-11-19 05:07:52,345 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2023-11-19 05:07:52,345 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2023-11-19 05:07:52,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:07:52,346 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2023-11-19 05:07:52,346 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2023-11-19 05:07:52,346 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Sign [2023-11-19 05:07:52,346 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Sign [2023-11-19 05:07:52,346 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-11-19 05:07:52,347 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-11-19 05:07:52,347 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAddress [2023-11-19 05:07:52,347 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAddress [2023-11-19 05:07:52,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:07:52,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:07:52,650 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:07:52,654 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:07:54,065 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:07:55,163 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:07:55,164 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:07:55,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:07:55 BoogieIcfgContainer [2023-11-19 05:07:55,187 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:07:55,191 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:07:55,191 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:07:55,195 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:07:55,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:07:50" (1/3) ... [2023-11-19 05:07:55,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2492bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:07:55, skipping insertion in model container [2023-11-19 05:07:55,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:51" (2/3) ... [2023-11-19 05:07:55,199 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2492bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:07:55, skipping insertion in model container [2023-11-19 05:07:55,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:07:55" (3/3) ... [2023-11-19 05:07:55,201 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec11_productSimulator.cil.c [2023-11-19 05:07:55,226 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:07:55,226 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:07:55,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:07:55,329 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=FINITE_AUTOMATA, 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;@39e0fcc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:07:55,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:07:55,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 377 states, 223 states have (on average 1.3318385650224216) internal successors, (297), 243 states have internal predecessors, (297), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) [2023-11-19 05:07:55,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-19 05:07:55,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:55,366 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:07:55,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:55,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:55,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1414350000, now seen corresponding path program 1 times [2023-11-19 05:07:55,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:55,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573876002] [2023-11-19 05:07:55,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:55,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-19 05:07:55,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:55,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573876002] [2023-11-19 05:07:55,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573876002] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:55,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:55,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:07:55,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728061474] [2023-11-19 05:07:55,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:55,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:07:55,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:55,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:07:55,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:07:55,957 INFO L87 Difference]: Start difference. First operand has 377 states, 223 states have (on average 1.3318385650224216) internal successors, (297), 243 states have internal predecessors, (297), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) Second operand has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-19 05:07:56,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:56,200 INFO L93 Difference]: Finished difference Result 596 states and 812 transitions. [2023-11-19 05:07:56,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:07:56,203 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 121 [2023-11-19 05:07:56,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:56,223 INFO L225 Difference]: With dead ends: 596 [2023-11-19 05:07:56,224 INFO L226 Difference]: Without dead ends: 374 [2023-11-19 05:07:56,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:07:56,245 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:56,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 460 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:07:56,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-19 05:07:56,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2023-11-19 05:07:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 221 states have (on average 1.3167420814479638) internal successors, (291), 240 states have internal predecessors, (291), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-19 05:07:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 508 transitions. [2023-11-19 05:07:56,332 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 508 transitions. Word has length 121 [2023-11-19 05:07:56,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:56,334 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 508 transitions. [2023-11-19 05:07:56,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-19 05:07:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 508 transitions. [2023-11-19 05:07:56,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-19 05:07:56,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:56,346 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:07:56,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:07:56,347 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:56,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:56,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1949937420, now seen corresponding path program 1 times [2023-11-19 05:07:56,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:56,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99681653] [2023-11-19 05:07:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:56,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-19 05:07:56,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:56,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99681653] [2023-11-19 05:07:56,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99681653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:56,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:56,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:07:56,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427079545] [2023-11-19 05:07:56,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:56,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:07:56,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:56,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:07:56,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:56,700 INFO L87 Difference]: Start difference. First operand 374 states and 508 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-19 05:07:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:56,861 INFO L93 Difference]: Finished difference Result 592 states and 786 transitions. [2023-11-19 05:07:56,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:07:56,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 122 [2023-11-19 05:07:56,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:56,870 INFO L225 Difference]: With dead ends: 592 [2023-11-19 05:07:56,871 INFO L226 Difference]: Without dead ends: 376 [2023-11-19 05:07:56,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:56,879 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 0 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:56,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 913 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:07:56,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-11-19 05:07:56,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2023-11-19 05:07:56,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 223 states have (on average 1.3139013452914798) internal successors, (293), 242 states have internal predecessors, (293), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-19 05:07:56,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 510 transitions. [2023-11-19 05:07:56,935 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 510 transitions. Word has length 122 [2023-11-19 05:07:56,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:56,938 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 510 transitions. [2023-11-19 05:07:56,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-19 05:07:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 510 transitions. [2023-11-19 05:07:56,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-19 05:07:56,946 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:56,946 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:07:56,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:07:56,947 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:56,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:56,948 INFO L85 PathProgramCache]: Analyzing trace with hash -55385328, now seen corresponding path program 1 times [2023-11-19 05:07:56,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:56,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908859428] [2023-11-19 05:07:56,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:56,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-19 05:07:57,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:57,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908859428] [2023-11-19 05:07:57,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908859428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:57,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:57,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:07:57,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863491672] [2023-11-19 05:07:57,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:57,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:07:57,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:57,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:07:57,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:57,149 INFO L87 Difference]: Start difference. First operand 376 states and 510 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-19 05:07:57,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:57,338 INFO L93 Difference]: Finished difference Result 751 states and 1034 transitions. [2023-11-19 05:07:57,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:07:57,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 127 [2023-11-19 05:07:57,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:57,343 INFO L225 Difference]: With dead ends: 751 [2023-11-19 05:07:57,343 INFO L226 Difference]: Without dead ends: 443 [2023-11-19 05:07:57,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:57,346 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 84 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:57,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 920 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:07:57,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-11-19 05:07:57,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 438. [2023-11-19 05:07:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 271 states have (on average 1.3653136531365313) internal successors, (370), 292 states have internal predecessors, (370), 123 states have call successors, (123), 43 states have call predecessors, (123), 43 states have return successors, (122), 121 states have call predecessors, (122), 122 states have call successors, (122) [2023-11-19 05:07:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 615 transitions. [2023-11-19 05:07:57,374 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 615 transitions. Word has length 127 [2023-11-19 05:07:57,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:57,375 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 615 transitions. [2023-11-19 05:07:57,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-19 05:07:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 615 transitions. [2023-11-19 05:07:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-19 05:07:57,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:57,379 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:07:57,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:07:57,379 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:57,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:57,380 INFO L85 PathProgramCache]: Analyzing trace with hash 102828319, now seen corresponding path program 1 times [2023-11-19 05:07:57,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:57,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742653268] [2023-11-19 05:07:57,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:57,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-19 05:07:57,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:57,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742653268] [2023-11-19 05:07:57,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742653268] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:07:57,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963316941] [2023-11-19 05:07:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:57,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:07:57,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:07:57,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:07:57,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:07:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:58,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 1377 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:07:58,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:07:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-19 05:07:58,284 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:07:58,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963316941] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:58,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:07:58,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 05:07:58,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152533882] [2023-11-19 05:07:58,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:58,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:07:58,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:58,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:07:58,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:07:58,288 INFO L87 Difference]: Start difference. First operand 438 states and 615 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-19 05:07:58,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:58,569 INFO L93 Difference]: Finished difference Result 1243 states and 1799 transitions. [2023-11-19 05:07:58,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:07:58,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 128 [2023-11-19 05:07:58,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:58,578 INFO L225 Difference]: With dead ends: 1243 [2023-11-19 05:07:58,578 INFO L226 Difference]: Without dead ends: 830 [2023-11-19 05:07:58,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 128 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 05:07:58,582 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 427 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:58,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 961 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:07:58,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2023-11-19 05:07:58,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 828. [2023-11-19 05:07:58,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 517 states have (on average 1.3636363636363635) internal successors, (705), 554 states have internal predecessors, (705), 225 states have call successors, (225), 85 states have call predecessors, (225), 85 states have return successors, (246), 223 states have call predecessors, (246), 223 states have call successors, (246) [2023-11-19 05:07:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1176 transitions. [2023-11-19 05:07:58,680 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1176 transitions. Word has length 128 [2023-11-19 05:07:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:58,682 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 1176 transitions. [2023-11-19 05:07:58,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-19 05:07:58,683 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1176 transitions. [2023-11-19 05:07:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-19 05:07:58,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:58,691 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:07:58,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:07:58,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:07:58,912 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:58,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:58,913 INFO L85 PathProgramCache]: Analyzing trace with hash 64760600, now seen corresponding path program 1 times [2023-11-19 05:07:58,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:58,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335321172] [2023-11-19 05:07:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:58,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-19 05:07:59,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:59,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335321172] [2023-11-19 05:07:59,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335321172] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:07:59,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054263532] [2023-11-19 05:07:59,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:59,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:07:59,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:07:59,154 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:07:59,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:07:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:59,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:07:59,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:07:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-19 05:07:59,699 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:07:59,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054263532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:59,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:07:59,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 05:07:59,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215913064] [2023-11-19 05:07:59,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:59,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:07:59,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:59,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:07:59,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:07:59,702 INFO L87 Difference]: Start difference. First operand 828 states and 1176 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-19 05:08:00,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:08:00,055 INFO L93 Difference]: Finished difference Result 2180 states and 3127 transitions. [2023-11-19 05:08:00,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:08:00,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 129 [2023-11-19 05:08:00,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:08:00,072 INFO L225 Difference]: With dead ends: 2180 [2023-11-19 05:08:00,072 INFO L226 Difference]: Without dead ends: 1582 [2023-11-19 05:08:00,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 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 05:08:00,077 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 416 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:08:00,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 1152 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:08:00,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2023-11-19 05:08:00,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1580. [2023-11-19 05:08:00,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 988 states have (on average 1.3593117408906883) internal successors, (1343), 1056 states have internal predecessors, (1343), 426 states have call successors, (426), 165 states have call predecessors, (426), 165 states have return successors, (493), 422 states have call predecessors, (493), 422 states have call successors, (493) [2023-11-19 05:08:00,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2262 transitions. [2023-11-19 05:08:00,258 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2262 transitions. Word has length 129 [2023-11-19 05:08:00,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:08:00,260 INFO L495 AbstractCegarLoop]: Abstraction has 1580 states and 2262 transitions. [2023-11-19 05:08:00,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-19 05:08:00,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2262 transitions. [2023-11-19 05:08:00,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-19 05:08:00,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:08:00,271 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:08:00,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:08:00,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:08:00,496 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:08:00,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:08:00,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1717292071, now seen corresponding path program 1 times [2023-11-19 05:08:00,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:08:00,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434659163] [2023-11-19 05:08:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:08:00,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:08:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:08:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-19 05:08:00,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:08:00,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434659163] [2023-11-19 05:08:00,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434659163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:08:00,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991747644] [2023-11-19 05:08:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:08:00,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:08:00,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:08:00,745 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:08:00,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:08:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:08:01,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 1390 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:08:01,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:08:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-19 05:08:01,276 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:08:01,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991747644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:08:01,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:08:01,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 05:08:01,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549698279] [2023-11-19 05:08:01,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:08:01,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:08:01,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:08:01,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:08:01,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:08:01,284 INFO L87 Difference]: Start difference. First operand 1580 states and 2262 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-19 05:08:01,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:08:01,773 INFO L93 Difference]: Finished difference Result 4213 states and 6181 transitions. [2023-11-19 05:08:01,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:08:01,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 131 [2023-11-19 05:08:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:08:01,808 INFO L225 Difference]: With dead ends: 4213 [2023-11-19 05:08:01,809 INFO L226 Difference]: Without dead ends: 2877 [2023-11-19 05:08:01,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 131 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 05:08:01,823 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 423 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:08:01,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 1117 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:08:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2023-11-19 05:08:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2875. [2023-11-19 05:08:02,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2875 states, 1794 states have (on average 1.3433667781493868) internal successors, (2410), 1906 states have internal predecessors, (2410), 765 states have call successors, (765), 314 states have call predecessors, (765), 315 states have return successors, (985), 763 states have call predecessors, (985), 757 states have call successors, (985) [2023-11-19 05:08:02,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 4160 transitions. [2023-11-19 05:08:02,091 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 4160 transitions. Word has length 131 [2023-11-19 05:08:02,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:08:02,093 INFO L495 AbstractCegarLoop]: Abstraction has 2875 states and 4160 transitions. [2023-11-19 05:08:02,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-19 05:08:02,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 4160 transitions. [2023-11-19 05:08:02,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-19 05:08:02,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:08:02,106 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:08:02,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:08:02,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 05:08:02,329 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:08:02,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:08:02,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2027496974, now seen corresponding path program 1 times [2023-11-19 05:08:02,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:08:02,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516513219] [2023-11-19 05:08:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:08:02,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:08:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:08:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-19 05:08:02,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:08:02,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516513219] [2023-11-19 05:08:02,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516513219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:08:02,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227687335] [2023-11-19 05:08:02,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:08:02,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:08:02,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:08:02,545 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:08:02,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:08:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:08:02,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 1392 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:08:02,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:08:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-19 05:08:03,073 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:08:03,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227687335] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:08:03,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:08:03,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 05:08:03,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176756763] [2023-11-19 05:08:03,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:08:03,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:08:03,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:08:03,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:08:03,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:08:03,077 INFO L87 Difference]: Start difference. First operand 2875 states and 4160 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-19 05:08:03,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:08:03,579 INFO L93 Difference]: Finished difference Result 7323 states and 11151 transitions. [2023-11-19 05:08:03,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:08:03,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 132 [2023-11-19 05:08:03,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:08:03,625 INFO L225 Difference]: With dead ends: 7323 [2023-11-19 05:08:03,625 INFO L226 Difference]: Without dead ends: 5289 [2023-11-19 05:08:03,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 132 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 05:08:03,639 INFO L413 NwaCegarLoop]: 788 mSDtfsCounter, 394 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:08:03,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 1205 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:08:03,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5289 states. [2023-11-19 05:08:04,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5289 to 5287. [2023-11-19 05:08:04,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5287 states, 3294 states have (on average 1.333940497874924) internal successors, (4394), 3478 states have internal predecessors, (4394), 1391 states have call successors, (1391), 598 states have call predecessors, (1391), 601 states have return successors, (2011), 1397 states have call predecessors, (2011), 1369 states have call successors, (2011) [2023-11-19 05:08:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5287 states to 5287 states and 7796 transitions. [2023-11-19 05:08:04,126 INFO L78 Accepts]: Start accepts. Automaton has 5287 states and 7796 transitions. Word has length 132 [2023-11-19 05:08:04,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:08:04,127 INFO L495 AbstractCegarLoop]: Abstraction has 5287 states and 7796 transitions. [2023-11-19 05:08:04,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-19 05:08:04,128 INFO L276 IsEmpty]: Start isEmpty. Operand 5287 states and 7796 transitions. [2023-11-19 05:08:04,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-19 05:08:04,154 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:08:04,154 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:08:04,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:08:04,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 05:08:04,383 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:08:04,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:08:04,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1796395479, now seen corresponding path program 1 times [2023-11-19 05:08:04,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:08:04,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969177320] [2023-11-19 05:08:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:08:04,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:08:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:08:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-19 05:08:04,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:08:04,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969177320] [2023-11-19 05:08:04,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969177320] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:08:04,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387261431] [2023-11-19 05:08:04,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:08:04,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:08:04,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:08:04,586 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:08:04,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e0d441-2326-4d3a-b930-12ef3249658e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:08:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:08:04,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 1392 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:08:05,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:08:05,062 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-19 05:08:05,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:08:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-19 05:08:05,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387261431] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:08:05,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1218946463] [2023-11-19 05:08:05,213 INFO L159 IcfgInterpreter]: Started Sifa with 112 locations of interest [2023-11-19 05:08:05,213 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:08:05,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:08:05,225 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:08:05,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs