./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-pthread/cs_stack-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_38fa42bb-493f-4a2a-bd99-5d66546a279e/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38fa42bb-493f-4a2a-bd99-5d66546a279e/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38fa42bb-493f-4a2a-bd99-5d66546a279e/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38fa42bb-493f-4a2a-bd99-5d66546a279e/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-pthread/cs_stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38fa42bb-493f-4a2a-bd99-5d66546a279e/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38fa42bb-493f-4a2a-bd99-5d66546a279e/bin/utaipan-verify-NcY6lQBIFX --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 0a870e8a4a7dff1b238c9b19b47586f7abd44e3f0eb9969b7dad7bbd7f80e506 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:01:37,713 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:01:37,788 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38fa42bb-493f-4a2a-bd99-5d66546a279e/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:01:37,794 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:01:37,795 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:01:37,827 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:01:37,828 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:01:37,829 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:01:37,830 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:01:37,830 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:01:37,831 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:01:37,832 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:01:37,833 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:01:37,833 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:01:37,834 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:01:37,835 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:01:37,835 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:01:37,836 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:01:37,837 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:01:37,837 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:01:37,838 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:01:37,839 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:01:37,840 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:01:37,841 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:01:37,841 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:01:37,842 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:01:37,842 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:01:37,843 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:01:37,843 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:01:37,844 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:01:37,844 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:01:37,845 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:01:37,845 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:01:37,846 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:01:37,846 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:01:37,847 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:01:37,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:01:37,848 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:01:37,848 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:01:37,848 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:01:37,849 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:01:37,849 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:01:37,849 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:01:37,850 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:01:37,850 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:01:37,850 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_38fa42bb-493f-4a2a-bd99-5d66546a279e/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38fa42bb-493f-4a2a-bd99-5d66546a279e/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a870e8a4a7dff1b238c9b19b47586f7abd44e3f0eb9969b7dad7bbd7f80e506 [2023-11-12 01:01:38,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:01:38,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:01:38,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:01:38,210 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:01:38,210 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:01:38,212 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38fa42bb-493f-4a2a-bd99-5d66546a279e/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/seq-pthread/cs_stack-2.i [2023-11-12 01:01:41,411 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:01:41,733 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:01:41,734 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38fa42bb-493f-4a2a-bd99-5d66546a279e/sv-benchmarks/c/seq-pthread/cs_stack-2.i [2023-11-12 01:01:41,777 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38fa42bb-493f-4a2a-bd99-5d66546a279e/bin/utaipan-verify-NcY6lQBIFX/data/43877d9e7/c6ec2d2823884541918d02996a4f2146/FLAGb400ba9b4 [2023-11-12 01:01:41,794 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38fa42bb-493f-4a2a-bd99-5d66546a279e/bin/utaipan-verify-NcY6lQBIFX/data/43877d9e7/c6ec2d2823884541918d02996a4f2146 [2023-11-12 01:01:41,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:01:41,799 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:01:41,800 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:01:41,800 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:01:41,806 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:01:41,807 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:01:41" (1/1) ... [2023-11-12 01:01:41,808 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c4dddef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:41, skipping insertion in model container [2023-11-12 01:01:41,808 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:01:41" (1/1) ... [2023-11-12 01:01:41,877 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:01:42,521 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_38fa42bb-493f-4a2a-bd99-5d66546a279e/sv-benchmarks/c/seq-pthread/cs_stack-2.i[34556,34569] [2023-11-12 01:01:42,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:01:42,713 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:01:42,778 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_38fa42bb-493f-4a2a-bd99-5d66546a279e/sv-benchmarks/c/seq-pthread/cs_stack-2.i[34556,34569] [2023-11-12 01:01:42,868 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:01:42,993 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:01:42,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:42 WrapperNode [2023-11-12 01:01:42,995 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:01:42,997 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:01:42,997 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:01:42,997 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:01:43,005 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:42" (1/1) ... [2023-11-12 01:01:43,061 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:42" (1/1) ... [2023-11-12 01:01:43,138 INFO L138 Inliner]: procedures = 252, calls = 268, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 601 [2023-11-12 01:01:43,139 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:01:43,139 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:01:43,140 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:01:43,140 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:01:43,150 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:42" (1/1) ... [2023-11-12 01:01:43,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:42" (1/1) ... [2023-11-12 01:01:43,177 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:42" (1/1) ... [2023-11-12 01:01:43,177 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:42" (1/1) ... [2023-11-12 01:01:43,242 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:42" (1/1) ... [2023-11-12 01:01:43,254 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:42" (1/1) ... [2023-11-12 01:01:43,263 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:42" (1/1) ... [2023-11-12 01:01:43,282 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:42" (1/1) ... [2023-11-12 01:01:43,290 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:01:43,295 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:01:43,295 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:01:43,295 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:01:43,296 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:42" (1/1) ... [2023-11-12 01:01:43,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:01:43,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38fa42bb-493f-4a2a-bd99-5d66546a279e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:43,346 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38fa42bb-493f-4a2a-bd99-5d66546a279e/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:01:43,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38fa42bb-493f-4a2a-bd99-5d66546a279e/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:01:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 01:01:43,407 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 01:01:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 01:01:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2023-11-12 01:01:43,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2023-11-12 01:01:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 01:01:43,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 01:01:43,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 01:01:43,411 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2023-11-12 01:01:43,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2023-11-12 01:01:43,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 01:01:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 01:01:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure get_top [2023-11-12 01:01:43,412 INFO L138 BoogieDeclarations]: Found implementation of procedure get_top [2023-11-12 01:01:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:01:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 01:01:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2023-11-12 01:01:43,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2023-11-12 01:01:43,414 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2023-11-12 01:01:43,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2023-11-12 01:01:43,415 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2023-11-12 01:01:43,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2023-11-12 01:01:43,416 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-12 01:01:43,416 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-12 01:01:43,417 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2023-11-12 01:01:43,418 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2023-11-12 01:01:43,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:01:43,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:01:43,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:01:43,653 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:01:43,656 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:01:43,718 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-12 01:01:43,719 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);#res := 0; [2023-11-12 01:01:43,758 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint L930-1: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296); [2023-11-12 01:01:43,759 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint L930-1: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-12 01:01:43,759 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##8: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-12 01:01:43,759 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296); [2023-11-12 01:01:43,759 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##7: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296); [2023-11-12 01:01:43,760 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-12 01:01:43,760 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-12 01:01:43,760 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296); [2023-11-12 01:01:43,760 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint L930: SUMMARY for call __CS_cs(); srcloc: null [2023-11-12 01:01:44,332 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-12 01:01:44,333 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);push_#res#1 := 0; [2023-11-12 01:01:44,342 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##54: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-12 01:01:44,343 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##53: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);pop_#res#1 := 0; [2023-11-12 01:01:44,343 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##58: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-12 01:01:44,343 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##57: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);pop_#res#1 := 0; [2023-11-12 01:01:44,343 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-12 01:01:44,344 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);pop_#res#1 := 0; [2023-11-12 01:01:44,344 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint L1002: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);pop_#res#1 := 0; [2023-11-12 01:01:44,344 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint L1002: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296));pop_#res#1 := 0; [2023-11-12 01:01:44,344 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint L986-4: SUMMARY for call __CS_cs(); srcloc: null [2023-11-12 01:01:44,344 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##111: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);push_#res#1 := 0; [2023-11-12 01:01:44,345 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##112: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-12 01:01:46,959 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:01:47,122 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:01:47,122 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 01:01:47,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:01:47 BoogieIcfgContainer [2023-11-12 01:01:47,126 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:01:47,130 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:01:47,130 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:01:47,133 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:01:47,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:01:41" (1/3) ... [2023-11-12 01:01:47,134 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e4a8d38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:01:47, skipping insertion in model container [2023-11-12 01:01:47,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:42" (2/3) ... [2023-11-12 01:01:47,136 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e4a8d38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:01:47, skipping insertion in model container [2023-11-12 01:01:47,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:01:47" (3/3) ... [2023-11-12 01:01:47,138 INFO L112 eAbstractionObserver]: Analyzing ICFG cs_stack-2.i [2023-11-12 01:01:47,157 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:01:47,157 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:01:47,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:01:47,234 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;@76da1e30, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:01:47,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:01:47,242 INFO L276 IsEmpty]: Start isEmpty. Operand has 196 states, 110 states have (on average 1.4454545454545455) internal successors, (159), 113 states have internal predecessors, (159), 75 states have call successors, (75), 9 states have call predecessors, (75), 9 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2023-11-12 01:01:47,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-12 01:01:47,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:47,272 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:47,272 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:47,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:47,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1707774654, now seen corresponding path program 1 times [2023-11-12 01:01:47,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:47,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808058562] [2023-11-12 01:01:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:47,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2023-11-12 01:01:48,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:48,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808058562] [2023-11-12 01:01:48,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808058562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:48,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:48,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:01:48,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559333429] [2023-11-12 01:01:48,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:48,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:01:48,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:48,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:01:48,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:01:48,820 INFO L87 Difference]: Start difference. First operand has 196 states, 110 states have (on average 1.4454545454545455) internal successors, (159), 113 states have internal predecessors, (159), 75 states have call successors, (75), 9 states have call predecessors, (75), 9 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2023-11-12 01:01:50,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:01:52,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:01:53,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:53,203 INFO L93 Difference]: Finished difference Result 383 states and 609 transitions. [2023-11-12 01:01:53,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:01:53,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 65 [2023-11-12 01:01:53,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:53,224 INFO L225 Difference]: With dead ends: 383 [2023-11-12 01:01:53,225 INFO L226 Difference]: Without dead ends: 344 [2023-11-12 01:01:53,228 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 [2023-11-12 01:01:53,232 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 255 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:53,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 859 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2023-11-12 01:01:53,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-11-12 01:01:53,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 340. [2023-11-12 01:01:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 192 states have (on average 1.46875) internal successors, (282), 196 states have internal predecessors, (282), 131 states have call successors, (131), 17 states have call predecessors, (131), 16 states have return successors, (135), 128 states have call predecessors, (135), 131 states have call successors, (135) [2023-11-12 01:01:53,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 548 transitions. [2023-11-12 01:01:53,369 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 548 transitions. Word has length 65 [2023-11-12 01:01:53,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:53,370 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 548 transitions. [2023-11-12 01:01:53,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2023-11-12 01:01:53,373 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 548 transitions. [2023-11-12 01:01:53,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-12 01:01:53,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:53,390 INFO L195 NwaCegarLoop]: trace histogram [19, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:53,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:01:53,390 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:53,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:53,391 INFO L85 PathProgramCache]: Analyzing trace with hash -762434021, now seen corresponding path program 1 times [2023-11-12 01:01:53,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:53,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494262438] [2023-11-12 01:01:53,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:53,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2023-11-12 01:01:54,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:54,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494262438] [2023-11-12 01:01:54,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494262438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:54,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:54,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:01:54,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260584096] [2023-11-12 01:01:54,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:54,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:01:54,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:54,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:01:54,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:01:54,379 INFO L87 Difference]: Start difference. First operand 340 states and 548 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2023-11-12 01:01:56,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:01:58,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:01:58,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:58,993 INFO L93 Difference]: Finished difference Result 672 states and 1086 transitions. [2023-11-12 01:01:58,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:01:58,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) Word has length 123 [2023-11-12 01:01:58,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:59,007 INFO L225 Difference]: With dead ends: 672 [2023-11-12 01:01:59,012 INFO L226 Difference]: Without dead ends: 637 [2023-11-12 01:01:59,016 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 [2023-11-12 01:01:59,017 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 309 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 36 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:59,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 814 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 136 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2023-11-12 01:01:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2023-11-12 01:01:59,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 627. [2023-11-12 01:01:59,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 352 states have (on average 1.4744318181818181) internal successors, (519), 363 states have internal predecessors, (519), 243 states have call successors, (243), 30 states have call predecessors, (243), 31 states have return successors, (263), 237 states have call predecessors, (263), 243 states have call successors, (263) [2023-11-12 01:01:59,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1025 transitions. [2023-11-12 01:01:59,127 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1025 transitions. Word has length 123 [2023-11-12 01:01:59,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:59,128 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 1025 transitions. [2023-11-12 01:01:59,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2023-11-12 01:01:59,128 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1025 transitions. [2023-11-12 01:01:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-12 01:01:59,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:59,137 INFO L195 NwaCegarLoop]: trace histogram [19, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:59,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 01:01:59,137 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:59,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:59,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1829359845, now seen corresponding path program 1 times [2023-11-12 01:01:59,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:59,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106359570] [2023-11-12 01:01:59,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:59,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2023-11-12 01:01:59,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:59,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106359570] [2023-11-12 01:01:59,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106359570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:59,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:59,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:01:59,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780576581] [2023-11-12 01:01:59,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:59,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:01:59,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:59,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:01:59,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:01:59,958 INFO L87 Difference]: Start difference. First operand 627 states and 1025 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2023-11-12 01:02:01,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:02:03,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:02:04,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:04,518 INFO L93 Difference]: Finished difference Result 1251 states and 2029 transitions. [2023-11-12 01:02:04,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:02:04,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) Word has length 123 [2023-11-12 01:02:04,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:04,530 INFO L225 Difference]: With dead ends: 1251 [2023-11-12 01:02:04,531 INFO L226 Difference]: Without dead ends: 641 [2023-11-12 01:02:04,539 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 [2023-11-12 01:02:04,543 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 330 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 44 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:04,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 804 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 115 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-11-12 01:02:04,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2023-11-12 01:02:04,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 629. [2023-11-12 01:02:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 353 states have (on average 1.4674220963172804) internal successors, (518), 366 states have internal predecessors, (518), 242 states have call successors, (242), 30 states have call predecessors, (242), 33 states have return successors, (259), 236 states have call predecessors, (259), 242 states have call successors, (259) [2023-11-12 01:02:04,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1019 transitions. [2023-11-12 01:02:04,657 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1019 transitions. Word has length 123 [2023-11-12 01:02:04,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:04,658 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 1019 transitions. [2023-11-12 01:02:04,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2023-11-12 01:02:04,659 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1019 transitions. [2023-11-12 01:02:04,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-12 01:02:04,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:04,667 INFO L195 NwaCegarLoop]: trace histogram [19, 5, 5, 5, 5, 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] [2023-11-12 01:02:04,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 01:02:04,668 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:04,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:04,668 INFO L85 PathProgramCache]: Analyzing trace with hash 398468463, now seen corresponding path program 1 times [2023-11-12 01:02:04,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:04,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720907635] [2023-11-12 01:02:04,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:04,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2023-11-12 01:02:05,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:05,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720907635] [2023-11-12 01:02:05,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720907635] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:05,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:05,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:02:05,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849724902] [2023-11-12 01:02:05,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:05,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:02:05,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:05,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:02:05,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:02:05,565 INFO L87 Difference]: Start difference. First operand 629 states and 1019 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (24), 1 states have call predecessors, (24), 2 states have return successors, (24), 3 states have call predecessors, (24), 4 states have call successors, (24) [2023-11-12 01:02:07,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:02:09,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:02:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:09,931 INFO L93 Difference]: Finished difference Result 705 states and 1121 transitions. [2023-11-12 01:02:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:02:09,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (24), 1 states have call predecessors, (24), 2 states have return successors, (24), 3 states have call predecessors, (24), 4 states have call successors, (24) Word has length 126 [2023-11-12 01:02:09,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:09,937 INFO L225 Difference]: With dead ends: 705 [2023-11-12 01:02:09,938 INFO L226 Difference]: Without dead ends: 630 [2023-11-12 01:02:09,939 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 [2023-11-12 01:02:09,940 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 269 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:09,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 879 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2023-11-12 01:02:09,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2023-11-12 01:02:10,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 622. [2023-11-12 01:02:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 349 states have (on average 1.4641833810888252) internal successors, (511), 361 states have internal predecessors, (511), 240 states have call successors, (240), 30 states have call predecessors, (240), 32 states have return successors, (254), 234 states have call predecessors, (254), 240 states have call successors, (254) [2023-11-12 01:02:10,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1005 transitions. [2023-11-12 01:02:10,026 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1005 transitions. Word has length 126 [2023-11-12 01:02:10,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:10,028 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 1005 transitions. [2023-11-12 01:02:10,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (24), 1 states have call predecessors, (24), 2 states have return successors, (24), 3 states have call predecessors, (24), 4 states have call successors, (24) [2023-11-12 01:02:10,029 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1005 transitions. [2023-11-12 01:02:10,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-12 01:02:10,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:10,036 INFO L195 NwaCegarLoop]: trace histogram [19, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:10,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 01:02:10,037 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:10,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:10,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1586348666, now seen corresponding path program 1 times [2023-11-12 01:02:10,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:10,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974599071] [2023-11-12 01:02:10,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:10,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2023-11-12 01:02:10,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:10,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974599071] [2023-11-12 01:02:10,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974599071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:10,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:10,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:02:10,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202518138] [2023-11-12 01:02:10,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:10,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:02:10,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:10,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:02:10,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:02:10,778 INFO L87 Difference]: Start difference. First operand 622 states and 1005 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2023-11-12 01:02:12,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:02:14,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:02:15,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:15,219 INFO L93 Difference]: Finished difference Result 975 states and 1546 transitions. [2023-11-12 01:02:15,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:02:15,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) Word has length 123 [2023-11-12 01:02:15,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:15,225 INFO L225 Difference]: With dead ends: 975 [2023-11-12 01:02:15,226 INFO L226 Difference]: Without dead ends: 540 [2023-11-12 01:02:15,231 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 [2023-11-12 01:02:15,232 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 313 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 35 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:15,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 835 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 115 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2023-11-12 01:02:15,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2023-11-12 01:02:15,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 530. [2023-11-12 01:02:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 297 states have (on average 1.4343434343434343) internal successors, (426), 306 states have internal predecessors, (426), 201 states have call successors, (201), 30 states have call predecessors, (201), 31 states have return successors, (214), 196 states have call predecessors, (214), 201 states have call successors, (214) [2023-11-12 01:02:15,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 841 transitions. [2023-11-12 01:02:15,304 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 841 transitions. Word has length 123 [2023-11-12 01:02:15,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:15,304 INFO L495 AbstractCegarLoop]: Abstraction has 530 states and 841 transitions. [2023-11-12 01:02:15,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2023-11-12 01:02:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 841 transitions. [2023-11-12 01:02:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-12 01:02:15,312 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:15,312 INFO L195 NwaCegarLoop]: trace histogram [19, 5, 5, 5, 5, 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] [2023-11-12 01:02:15,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 01:02:15,313 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:15,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:15,313 INFO L85 PathProgramCache]: Analyzing trace with hash -754132946, now seen corresponding path program 1 times [2023-11-12 01:02:15,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:15,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511442127] [2023-11-12 01:02:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:15,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2023-11-12 01:02:24,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:24,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511442127] [2023-11-12 01:02:24,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511442127] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:24,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873989938] [2023-11-12 01:02:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:24,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:24,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38fa42bb-493f-4a2a-bd99-5d66546a279e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:24,843 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38fa42bb-493f-4a2a-bd99-5d66546a279e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:24,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38fa42bb-493f-4a2a-bd99-5d66546a279e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:02:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:25,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-12 01:02:25,530 INFO L285 TraceCheckSpWp]: Computing forward predicates...