./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product24.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_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/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_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/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_0d80deb3-fe27-4c25-84f0-39f219049d5e/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 d9a9e332bba43f0e6d965514fc764881b170e0a0500d860d4fcce12986d98914 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:52:33,694 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:52:33,762 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:52:33,769 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:52:33,769 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:52:33,796 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:52:33,797 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:52:33,798 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:52:33,799 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:52:33,799 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:52:33,800 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:52:33,801 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:52:33,802 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:52:33,802 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:52:33,803 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:52:33,804 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:52:33,804 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:52:33,805 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:52:33,806 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:52:33,807 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:52:33,807 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:52:33,812 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:52:33,813 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:52:33,813 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:52:33,814 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:52:33,815 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:52:33,815 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:52:33,816 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:52:33,817 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:52:33,817 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:52:33,818 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:52:33,819 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:52:33,820 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:52:33,820 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:52:33,821 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:52:33,821 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:52:33,821 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:52:33,822 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:52:33,822 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:52:33,822 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:52:33,823 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:52:33,823 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:52:33,823 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:52:33,824 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:52:33,825 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:52:33,825 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_0d80deb3-fe27-4c25-84f0-39f219049d5e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9a9e332bba43f0e6d965514fc764881b170e0a0500d860d4fcce12986d98914 [2023-11-19 04:52:34,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:52:34,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:52:34,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:52:34,183 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:52:34,183 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:52:34,186 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c [2023-11-19 04:52:37,295 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:52:37,730 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:52:37,731 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c [2023-11-19 04:52:37,764 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/data/95a3f885f/d644611cd2b947e9b092a4b68a47facc/FLAG1885737c6 [2023-11-19 04:52:37,782 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/data/95a3f885f/d644611cd2b947e9b092a4b68a47facc [2023-11-19 04:52:37,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:52:37,790 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:52:37,793 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:52:37,793 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:52:37,799 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:52:37,802 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:52:37" (1/1) ... [2023-11-19 04:52:37,803 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f2f61b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:37, skipping insertion in model container [2023-11-19 04:52:37,803 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:52:37" (1/1) ... [2023-11-19 04:52:37,912 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:52:38,564 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_0d80deb3-fe27-4c25-84f0-39f219049d5e/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c[71679,71692] [2023-11-19 04:52:38,569 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:52:38,585 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:52:38,596 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [48] [2023-11-19 04:52:38,597 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [408] [2023-11-19 04:52:38,597 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification14_spec.i","") [422] [2023-11-19 04:52:38,598 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [467] [2023-11-19 04:52:38,598 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2112] [2023-11-19 04:52:38,598 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2773] [2023-11-19 04:52:38,598 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3139] [2023-11-19 04:52:38,599 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3174] [2023-11-19 04:52:38,599 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [3292] [2023-11-19 04:52:38,599 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3383] [2023-11-19 04:52:38,765 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_0d80deb3-fe27-4c25-84f0-39f219049d5e/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c[71679,71692] [2023-11-19 04:52:38,770 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:52:38,812 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:52:38,813 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:38 WrapperNode [2023-11-19 04:52:38,813 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:52:38,815 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:52:38,815 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:52:38,815 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:52:38,824 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:38" (1/1) ... [2023-11-19 04:52:38,887 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:38" (1/1) ... [2023-11-19 04:52:38,974 INFO L138 Inliner]: procedures = 95, calls = 346, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 862 [2023-11-19 04:52:38,975 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:52:38,976 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:52:38,976 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:52:38,977 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:52:38,987 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:38" (1/1) ... [2023-11-19 04:52:38,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:38" (1/1) ... [2023-11-19 04:52:39,005 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:38" (1/1) ... [2023-11-19 04:52:39,011 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:38" (1/1) ... [2023-11-19 04:52:39,048 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:38" (1/1) ... [2023-11-19 04:52:39,076 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:38" (1/1) ... [2023-11-19 04:52:39,101 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:38" (1/1) ... [2023-11-19 04:52:39,106 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:38" (1/1) ... [2023-11-19 04:52:39,114 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:52:39,115 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:52:39,115 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:52:39,115 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:52:39,116 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:38" (1/1) ... [2023-11-19 04:52:39,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:52:39,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:52:39,150 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:52:39,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:52:39,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:52:39,186 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 04:52:39,186 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 04:52:39,186 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 04:52:39,187 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 04:52:39,187 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-19 04:52:39,187 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-19 04:52:39,187 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 04:52:39,187 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 04:52:39,187 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-19 04:52:39,187 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-19 04:52:39,188 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 04:52:39,188 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 04:52:39,188 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-19 04:52:39,188 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-19 04:52:39,188 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 04:52:39,188 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 04:52:39,188 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 04:52:39,190 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 04:52:39,190 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 04:52:39,190 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 04:52:39,190 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-19 04:52:39,190 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-19 04:52:39,190 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 04:52:39,190 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 04:52:39,191 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 04:52:39,191 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 04:52:39,191 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 04:52:39,191 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 04:52:39,191 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-19 04:52:39,191 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-19 04:52:39,191 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 04:52:39,191 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 04:52:39,191 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 04:52:39,192 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 04:52:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 04:52:39,192 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 04:52:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 04:52:39,192 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 04:52:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 04:52:39,192 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 04:52:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:52:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-19 04:52:39,193 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-19 04:52:39,193 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 04:52:39,193 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 04:52:39,193 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 04:52:39,193 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 04:52:39,193 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 04:52:39,193 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 04:52:39,193 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-11-19 04:52:39,194 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-11-19 04:52:39,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:52:39,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:52:39,194 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 04:52:39,194 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 04:52:39,194 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-11-19 04:52:39,194 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-11-19 04:52:39,358 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:52:39,361 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:52:40,716 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:52:41,673 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:52:41,674 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:52:41,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:52:41 BoogieIcfgContainer [2023-11-19 04:52:41,689 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:52:41,693 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:52:41,693 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:52:41,696 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:52:41,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:52:37" (1/3) ... [2023-11-19 04:52:41,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49265c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:52:41, skipping insertion in model container [2023-11-19 04:52:41,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:38" (2/3) ... [2023-11-19 04:52:41,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49265c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:52:41, skipping insertion in model container [2023-11-19 04:52:41,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:52:41" (3/3) ... [2023-11-19 04:52:41,700 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product24.cil.c [2023-11-19 04:52:41,719 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:52:41,720 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:52:41,804 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:52:41,812 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;@567a9bce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:52:41,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:52:41,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 389 states, 257 states have (on average 1.5447470817120623) internal successors, (397), 275 states have internal predecessors, (397), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-19 04:52:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 04:52:41,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:41,838 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:41,839 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:52:41,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:41,847 INFO L85 PathProgramCache]: Analyzing trace with hash -294007370, now seen corresponding path program 1 times [2023-11-19 04:52:41,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:41,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520047271] [2023-11-19 04:52:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:41,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:52:42,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:42,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520047271] [2023-11-19 04:52:42,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520047271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:42,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:42,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:52:42,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671650129] [2023-11-19 04:52:42,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:42,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:52:42,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:42,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:52:42,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:52:42,781 INFO L87 Difference]: Start difference. First operand has 389 states, 257 states have (on average 1.5447470817120623) internal successors, (397), 275 states have internal predecessors, (397), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-19 04:52:43,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:43,228 INFO L93 Difference]: Finished difference Result 1143 states and 1798 transitions. [2023-11-19 04:52:43,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:52:43,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2023-11-19 04:52:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:43,253 INFO L225 Difference]: With dead ends: 1143 [2023-11-19 04:52:43,253 INFO L226 Difference]: Without dead ends: 755 [2023-11-19 04:52:43,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:52:43,268 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 577 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:43,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 1161 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:52:43,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2023-11-19 04:52:43,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 719. [2023-11-19 04:52:43,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 489 states have (on average 1.5460122699386503) internal successors, (756), 515 states have internal predecessors, (756), 182 states have call successors, (182), 49 states have call predecessors, (182), 47 states have return successors, (187), 169 states have call predecessors, (187), 180 states have call successors, (187) [2023-11-19 04:52:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1125 transitions. [2023-11-19 04:52:43,429 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1125 transitions. Word has length 43 [2023-11-19 04:52:43,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:43,430 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 1125 transitions. [2023-11-19 04:52:43,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-19 04:52:43,431 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1125 transitions. [2023-11-19 04:52:43,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-19 04:52:43,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:43,451 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:43,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:52:43,452 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:52:43,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:43,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1528111387, now seen corresponding path program 1 times [2023-11-19 04:52:43,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:43,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114861716] [2023-11-19 04:52:43,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:43,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-19 04:52:43,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:43,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114861716] [2023-11-19 04:52:43,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114861716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:52:43,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122028903] [2023-11-19 04:52:43,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:43,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:52:43,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:52:43,978 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:52:44,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:52:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:44,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 1371 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 04:52:44,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:52:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 04:52:44,544 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:52:44,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122028903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:44,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:52:44,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-11-19 04:52:44,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832892004] [2023-11-19 04:52:44,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:44,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:52:44,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:44,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:52:44,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-19 04:52:44,554 INFO L87 Difference]: Start difference. First operand 719 states and 1125 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 04:52:45,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:45,358 INFO L93 Difference]: Finished difference Result 1692 states and 2622 transitions. [2023-11-19 04:52:45,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:52:45,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 86 [2023-11-19 04:52:45,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:45,374 INFO L225 Difference]: With dead ends: 1692 [2023-11-19 04:52:45,374 INFO L226 Difference]: Without dead ends: 984 [2023-11-19 04:52:45,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:52:45,381 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 391 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2417 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:45,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 2417 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:52:45,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2023-11-19 04:52:45,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 970. [2023-11-19 04:52:45,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 645 states have (on average 1.4806201550387597) internal successors, (955), 672 states have internal predecessors, (955), 249 states have call successors, (249), 75 states have call predecessors, (249), 75 states have return successors, (279), 236 states have call predecessors, (279), 245 states have call successors, (279) [2023-11-19 04:52:45,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1483 transitions. [2023-11-19 04:52:45,503 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1483 transitions. Word has length 86 [2023-11-19 04:52:45,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:45,504 INFO L495 AbstractCegarLoop]: Abstraction has 970 states and 1483 transitions. [2023-11-19 04:52:45,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 04:52:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1483 transitions. [2023-11-19 04:52:45,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-19 04:52:45,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:45,510 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:45,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:52:45,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:52:45,725 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:52:45,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:45,725 INFO L85 PathProgramCache]: Analyzing trace with hash 2008808769, now seen corresponding path program 1 times [2023-11-19 04:52:45,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:45,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498367450] [2023-11-19 04:52:45,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:45,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 04:52:46,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:46,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498367450] [2023-11-19 04:52:46,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498367450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:46,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:46,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 04:52:46,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503153488] [2023-11-19 04:52:46,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:46,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:52:46,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:46,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:52:46,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:52:46,199 INFO L87 Difference]: Start difference. First operand 970 states and 1483 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-19 04:52:49,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:49,040 INFO L93 Difference]: Finished difference Result 2917 states and 4521 transitions. [2023-11-19 04:52:49,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:52:49,041 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2023-11-19 04:52:49,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:49,059 INFO L225 Difference]: With dead ends: 2917 [2023-11-19 04:52:49,059 INFO L226 Difference]: Without dead ends: 1960 [2023-11-19 04:52:49,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:52:49,072 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 1155 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:49,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 1257 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-19 04:52:49,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2023-11-19 04:52:49,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1716. [2023-11-19 04:52:49,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1155 states have (on average 1.503030303030303) internal successors, (1736), 1205 states have internal predecessors, (1736), 427 states have call successors, (427), 131 states have call predecessors, (427), 133 states have return successors, (485), 406 states have call predecessors, (485), 421 states have call successors, (485) [2023-11-19 04:52:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2648 transitions. [2023-11-19 04:52:49,215 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2648 transitions. Word has length 87 [2023-11-19 04:52:49,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:49,218 INFO L495 AbstractCegarLoop]: Abstraction has 1716 states and 2648 transitions. [2023-11-19 04:52:49,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-19 04:52:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2648 transitions. [2023-11-19 04:52:49,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-19 04:52:49,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:49,225 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:49,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:52:49,226 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:52:49,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:49,227 INFO L85 PathProgramCache]: Analyzing trace with hash 427255663, now seen corresponding path program 1 times [2023-11-19 04:52:49,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:49,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820247500] [2023-11-19 04:52:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:49,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-19 04:52:49,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:49,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820247500] [2023-11-19 04:52:49,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820247500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:49,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:49,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 04:52:49,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811427117] [2023-11-19 04:52:49,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:49,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:52:49,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:49,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:52:49,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:52:49,780 INFO L87 Difference]: Start difference. First operand 1716 states and 2648 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-19 04:52:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:52,893 INFO L93 Difference]: Finished difference Result 2082 states and 3239 transitions. [2023-11-19 04:52:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 04:52:52,894 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2023-11-19 04:52:52,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:52,923 INFO L225 Difference]: With dead ends: 2082 [2023-11-19 04:52:52,923 INFO L226 Difference]: Without dead ends: 2080 [2023-11-19 04:52:52,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-11-19 04:52:52,933 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 1454 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 3203 mSolverCounterSat, 843 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 4046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 843 IncrementalHoareTripleChecker+Valid, 3203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:52,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1476 Valid, 1989 Invalid, 4046 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [843 Valid, 3203 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-19 04:52:52,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2023-11-19 04:52:53,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1896. [2023-11-19 04:52:53,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1249 states have (on average 1.4939951961569256) internal successors, (1866), 1321 states have internal predecessors, (1866), 509 states have call successors, (509), 131 states have call predecessors, (509), 137 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2023-11-19 04:52:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2944 transitions. [2023-11-19 04:52:53,204 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2944 transitions. Word has length 91 [2023-11-19 04:52:53,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:53,211 INFO L495 AbstractCegarLoop]: Abstraction has 1896 states and 2944 transitions. [2023-11-19 04:52:53,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-19 04:52:53,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2944 transitions. [2023-11-19 04:52:53,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-19 04:52:53,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:53,223 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:53,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:52:53,224 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:52:53,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:53,230 INFO L85 PathProgramCache]: Analyzing trace with hash -305423137, now seen corresponding path program 1 times [2023-11-19 04:52:53,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:53,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145497561] [2023-11-19 04:52:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:53,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-19 04:52:53,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:53,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145497561] [2023-11-19 04:52:53,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145497561] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:53,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:53,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:52:53,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596064166] [2023-11-19 04:52:53,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:53,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:52:53,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:53,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:52:53,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:52:53,551 INFO L87 Difference]: Start difference. First operand 1896 states and 2944 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 04:52:53,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:53,903 INFO L93 Difference]: Finished difference Result 3878 states and 6086 transitions. [2023-11-19 04:52:53,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:52:53,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 122 [2023-11-19 04:52:53,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:53,922 INFO L225 Difference]: With dead ends: 3878 [2023-11-19 04:52:53,922 INFO L226 Difference]: Without dead ends: 1994 [2023-11-19 04:52:53,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:52:53,939 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 30 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1650 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:53,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1650 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:52:53,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2023-11-19 04:52:54,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1908. [2023-11-19 04:52:54,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1261 states have (on average 1.4892942109436955) internal successors, (1878), 1333 states have internal predecessors, (1878), 509 states have call successors, (509), 131 states have call predecessors, (509), 137 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2023-11-19 04:52:54,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2956 transitions. [2023-11-19 04:52:54,190 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2956 transitions. Word has length 122 [2023-11-19 04:52:54,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:54,191 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 2956 transitions. [2023-11-19 04:52:54,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 04:52:54,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2956 transitions. [2023-11-19 04:52:54,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-19 04:52:54,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:54,200 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:54,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:52:54,201 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:52:54,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:54,201 INFO L85 PathProgramCache]: Analyzing trace with hash -845320533, now seen corresponding path program 1 times [2023-11-19 04:52:54,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:54,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790319163] [2023-11-19 04:52:54,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:54,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-19 04:52:54,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:54,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790319163] [2023-11-19 04:52:54,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790319163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:52:54,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650543253] [2023-11-19 04:52:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:54,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:52:54,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:52:54,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:52:54,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:52:55,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:55,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 1513 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:52:55,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:52:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-19 04:52:55,097 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:52:55,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650543253] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:55,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:52:55,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-19 04:52:55,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127620349] [2023-11-19 04:52:55,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:55,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:52:55,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:55,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:52:55,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-19 04:52:55,102 INFO L87 Difference]: Start difference. First operand 1908 states and 2956 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 04:52:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:55,545 INFO L93 Difference]: Finished difference Result 3960 states and 6260 transitions. [2023-11-19 04:52:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:52:55,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 129 [2023-11-19 04:52:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:55,564 INFO L225 Difference]: With dead ends: 3960 [2023-11-19 04:52:55,565 INFO L226 Difference]: Without dead ends: 2064 [2023-11-19 04:52:55,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-19 04:52:55,580 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 213 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:55,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1446 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:52:55,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2023-11-19 04:52:55,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 2064. [2023-11-19 04:52:55,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 1413 states have (on average 1.5357395612172682) internal successors, (2170), 1485 states have internal predecessors, (2170), 509 states have call successors, (509), 135 states have call predecessors, (509), 141 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2023-11-19 04:52:55,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 3248 transitions. [2023-11-19 04:52:55,760 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 3248 transitions. Word has length 129 [2023-11-19 04:52:55,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:55,760 INFO L495 AbstractCegarLoop]: Abstraction has 2064 states and 3248 transitions. [2023-11-19 04:52:55,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 04:52:55,761 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 3248 transitions. [2023-11-19 04:52:55,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-19 04:52:55,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:55,768 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:55,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:52:55,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:52:55,990 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:52:55,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:55,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1716604052, now seen corresponding path program 1 times [2023-11-19 04:52:55,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:55,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665843548] [2023-11-19 04:52:55,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:55,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-19 04:52:56,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:56,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665843548] [2023-11-19 04:52:56,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665843548] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:52:56,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752302095] [2023-11-19 04:52:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:56,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:52:56,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:52:56,224 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:52:56,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:52:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:56,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 1518 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:52:56,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:52:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 04:52:56,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:52:56,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752302095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:56,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:52:56,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-19 04:52:56,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885613308] [2023-11-19 04:52:56,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:56,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:52:56,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:56,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:52:56,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:52:56,624 INFO L87 Difference]: Start difference. First operand 2064 states and 3248 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 04:52:57,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:57,040 INFO L93 Difference]: Finished difference Result 4272 states and 6838 transitions. [2023-11-19 04:52:57,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:52:57,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 134 [2023-11-19 04:52:57,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:57,063 INFO L225 Difference]: With dead ends: 4272 [2023-11-19 04:52:57,064 INFO L226 Difference]: Without dead ends: 2220 [2023-11-19 04:52:57,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:52:57,079 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 211 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:57,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1446 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:52:57,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2023-11-19 04:52:57,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2220. [2023-11-19 04:52:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 1565 states have (on average 1.5731629392971247) internal successors, (2462), 1637 states have internal predecessors, (2462), 509 states have call successors, (509), 139 states have call predecessors, (509), 145 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2023-11-19 04:52:57,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 3540 transitions. [2023-11-19 04:52:57,259 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 3540 transitions. Word has length 134 [2023-11-19 04:52:57,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:57,260 INFO L495 AbstractCegarLoop]: Abstraction has 2220 states and 3540 transitions. [2023-11-19 04:52:57,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 04:52:57,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 3540 transitions. [2023-11-19 04:52:57,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-19 04:52:57,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:57,269 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:57,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:52:57,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:52:57,493 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:52:57,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:57,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1452530940, now seen corresponding path program 1 times [2023-11-19 04:52:57,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:57,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34897516] [2023-11-19 04:52:57,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:57,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-19 04:52:57,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:57,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34897516] [2023-11-19 04:52:57,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34897516] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:52:57,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564011564] [2023-11-19 04:52:57,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:57,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:52:57,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:52:57,757 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:52:57,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:52:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:58,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 1522 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:52:58,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:52:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 04:52:58,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:52:58,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564011564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:58,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:52:58,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-19 04:52:58,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157586238] [2023-11-19 04:52:58,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:58,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:52:58,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:58,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:52:58,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:52:58,186 INFO L87 Difference]: Start difference. First operand 2220 states and 3540 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 04:52:58,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:58,680 INFO L93 Difference]: Finished difference Result 4584 states and 7416 transitions. [2023-11-19 04:52:58,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:52:58,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 138 [2023-11-19 04:52:58,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:58,705 INFO L225 Difference]: With dead ends: 4584 [2023-11-19 04:52:58,705 INFO L226 Difference]: Without dead ends: 2376 [2023-11-19 04:52:58,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:52:58,724 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 209 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:58,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1446 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:52:58,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2023-11-19 04:52:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2376. [2023-11-19 04:52:58,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 1717 states have (on average 1.603960396039604) internal successors, (2754), 1789 states have internal predecessors, (2754), 509 states have call successors, (509), 143 states have call predecessors, (509), 149 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2023-11-19 04:52:58,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 3832 transitions. [2023-11-19 04:52:58,950 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 3832 transitions. Word has length 138 [2023-11-19 04:52:58,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:58,952 INFO L495 AbstractCegarLoop]: Abstraction has 2376 states and 3832 transitions. [2023-11-19 04:52:58,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 04:52:58,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 3832 transitions. [2023-11-19 04:52:59,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-19 04:52:59,007 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:59,008 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:59,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:52:59,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:52:59,225 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:52:59,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:59,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1094892725, now seen corresponding path program 1 times [2023-11-19 04:52:59,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:59,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462954668] [2023-11-19 04:52:59,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:59,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-19 04:52:59,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:59,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462954668] [2023-11-19 04:52:59,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462954668] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:52:59,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667287228] [2023-11-19 04:52:59,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:59,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:52:59,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:52:59,444 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:52:59,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:52:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:59,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 1525 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:52:59,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:52:59,833 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 04:52:59,833 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:52:59,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667287228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:59,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:52:59,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-19 04:52:59,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134836813] [2023-11-19 04:52:59,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:59,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:52:59,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:59,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:52:59,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:52:59,837 INFO L87 Difference]: Start difference. First operand 2376 states and 3832 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 04:53:00,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:53:00,302 INFO L93 Difference]: Finished difference Result 4896 states and 7994 transitions. [2023-11-19 04:53:00,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:53:00,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 141 [2023-11-19 04:53:00,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:53:00,325 INFO L225 Difference]: With dead ends: 4896 [2023-11-19 04:53:00,326 INFO L226 Difference]: Without dead ends: 2532 [2023-11-19 04:53:00,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:53:00,343 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 207 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:53:00,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1446 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:53:00,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2023-11-19 04:53:00,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2532. [2023-11-19 04:53:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2532 states, 1869 states have (on average 1.6297485286249331) internal successors, (3046), 1941 states have internal predecessors, (3046), 509 states have call successors, (509), 147 states have call predecessors, (509), 153 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2023-11-19 04:53:00,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2532 states to 2532 states and 4124 transitions. [2023-11-19 04:53:00,608 INFO L78 Accepts]: Start accepts. Automaton has 2532 states and 4124 transitions. Word has length 141 [2023-11-19 04:53:00,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:53:00,609 INFO L495 AbstractCegarLoop]: Abstraction has 2532 states and 4124 transitions. [2023-11-19 04:53:00,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 04:53:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2532 states and 4124 transitions. [2023-11-19 04:53:00,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-19 04:53:00,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:00,619 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:00,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:53:00,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:00,832 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:00,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:00,833 INFO L85 PathProgramCache]: Analyzing trace with hash 300226171, now seen corresponding path program 1 times [2023-11-19 04:53:00,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:00,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399947447] [2023-11-19 04:53:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:00,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-19 04:53:01,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:01,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399947447] [2023-11-19 04:53:01,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399947447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:53:01,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:53:01,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:53:01,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535029442] [2023-11-19 04:53:01,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:53:01,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:53:01,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:53:01,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:53:01,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:53:01,038 INFO L87 Difference]: Start difference. First operand 2532 states and 4124 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-19 04:53:01,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:53:01,524 INFO L93 Difference]: Finished difference Result 5220 states and 8578 transitions. [2023-11-19 04:53:01,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:53:01,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 143 [2023-11-19 04:53:01,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:53:01,552 INFO L225 Difference]: With dead ends: 5220 [2023-11-19 04:53:01,552 INFO L226 Difference]: Without dead ends: 2668 [2023-11-19 04:53:01,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:53:01,571 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 99 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:53:01,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1459 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:53:01,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2023-11-19 04:53:01,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 2668. [2023-11-19 04:53:01,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 2001 states have (on average 1.5582208895552223) internal successors, (3118), 2073 states have internal predecessors, (3118), 509 states have call successors, (509), 151 states have call predecessors, (509), 157 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2023-11-19 04:53:01,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 4196 transitions. [2023-11-19 04:53:01,850 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 4196 transitions. Word has length 143 [2023-11-19 04:53:01,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:53:01,851 INFO L495 AbstractCegarLoop]: Abstraction has 2668 states and 4196 transitions. [2023-11-19 04:53:01,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-19 04:53:01,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 4196 transitions. [2023-11-19 04:53:01,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-19 04:53:01,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:01,860 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:01,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 04:53:01,860 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:01,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:01,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1328009834, now seen corresponding path program 1 times [2023-11-19 04:53:01,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:01,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385654523] [2023-11-19 04:53:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:01,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-19 04:53:02,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:02,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385654523] [2023-11-19 04:53:02,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385654523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:53:02,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:53:02,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 04:53:02,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037490542] [2023-11-19 04:53:02,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:53:02,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:53:02,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:53:02,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:53:02,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:53:02,232 INFO L87 Difference]: Start difference. First operand 2668 states and 4196 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2023-11-19 04:53:06,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:53:06,702 INFO L93 Difference]: Finished difference Result 6865 states and 10989 transitions. [2023-11-19 04:53:06,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 04:53:06,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 143 [2023-11-19 04:53:06,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:53:06,750 INFO L225 Difference]: With dead ends: 6865 [2023-11-19 04:53:06,750 INFO L226 Difference]: Without dead ends: 3844 [2023-11-19 04:53:06,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:53:06,772 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 1667 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 4094 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1732 SdHoareTripleChecker+Valid, 1985 SdHoareTripleChecker+Invalid, 4868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 4094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:53:06,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1732 Valid, 1985 Invalid, 4868 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [774 Valid, 4094 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-11-19 04:53:06,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2023-11-19 04:53:07,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3666. [2023-11-19 04:53:07,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3666 states, 2616 states have (on average 1.480886850152905) internal successors, (3874), 2746 states have internal predecessors, (3874), 793 states have call successors, (793), 231 states have call predecessors, (793), 256 states have return successors, (988), 745 states have call predecessors, (988), 787 states have call successors, (988) [2023-11-19 04:53:07,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 5655 transitions. [2023-11-19 04:53:07,146 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 5655 transitions. Word has length 143 [2023-11-19 04:53:07,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:53:07,147 INFO L495 AbstractCegarLoop]: Abstraction has 3666 states and 5655 transitions. [2023-11-19 04:53:07,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2023-11-19 04:53:07,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 5655 transitions. [2023-11-19 04:53:07,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-19 04:53:07,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:07,156 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:07,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 04:53:07,157 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:07,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:07,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2013940404, now seen corresponding path program 1 times [2023-11-19 04:53:07,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:07,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241677669] [2023-11-19 04:53:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:07,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-19 04:53:12,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:12,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241677669] [2023-11-19 04:53:12,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241677669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:53:12,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817660996] [2023-11-19 04:53:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:12,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:12,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:12,197 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:53:12,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d80deb3-fe27-4c25-84f0-39f219049d5e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:53:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:12,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 1528 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-19 04:53:12,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:53:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-19 04:53:15,353 INFO L327 TraceCheckSpWp]: Computing backward predicates...