./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array4_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje --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 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:29:26,500 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:29:26,598 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 04:29:26,606 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:29:26,607 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:29:26,639 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:29:26,640 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:29:26,640 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:29:26,641 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:29:26,641 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:29:26,642 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:29:26,643 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:29:26,643 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:29:26,644 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:29:26,644 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:29:26,645 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:29:26,645 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:29:26,646 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:29:26,646 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:29:26,647 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:29:26,648 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:29:26,648 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:29:26,649 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:29:26,650 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 04:29:26,650 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:29:26,651 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:29:26,651 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:29:26,652 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:29:26,652 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 04:29:26,653 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:29:26,653 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 04:29:26,654 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:29:26,654 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:29:26,655 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 04:29:26,655 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:29:26,655 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:29:26,656 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:29:26,656 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:29:26,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:29:26,657 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:29:26,658 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:29:26,658 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 04:29:26,659 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:29:26,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:29:26,660 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:29:26,660 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:29:26,660 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:29:26,661 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_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2024-11-09 04:29:26,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:29:26,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:29:26,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:29:26,999 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:29:26,999 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:29:27,001 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-patterns/array4_pattern.c Unable to find full path for "g++" [2024-11-09 04:29:29,045 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:29:29,235 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:29:29,236 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/sv-benchmarks/c/array-patterns/array4_pattern.c [2024-11-09 04:29:29,243 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/data/e567d3e29/029914dac6fa44d5a7c12670fa3b26fb/FLAG6a02a8a05 [2024-11-09 04:29:29,258 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/data/e567d3e29/029914dac6fa44d5a7c12670fa3b26fb [2024-11-09 04:29:29,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:29:29,262 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:29:29,264 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:29:29,264 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:29:29,270 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:29:29,271 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:29:29" (1/1) ... [2024-11-09 04:29:29,272 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f3a3b3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:29, skipping insertion in model container [2024-11-09 04:29:29,272 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:29:29" (1/1) ... [2024-11-09 04:29:29,295 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:29:29,482 WARN L250 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_ffb78f86-62a5-467b-b394-9afb36fa5606/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2024-11-09 04:29:29,507 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:29:29,515 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:29:29,528 WARN L250 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_ffb78f86-62a5-467b-b394-9afb36fa5606/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2024-11-09 04:29:29,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:29:29,556 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:29:29,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:29 WrapperNode [2024-11-09 04:29:29,556 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:29:29,558 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:29:29,558 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:29:29,558 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:29:29,566 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:29" (1/1) ... [2024-11-09 04:29:29,578 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:29" (1/1) ... [2024-11-09 04:29:29,598 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2024-11-09 04:29:29,598 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:29:29,599 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:29:29,603 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:29:29,604 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:29:29,613 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:29" (1/1) ... [2024-11-09 04:29:29,613 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:29" (1/1) ... [2024-11-09 04:29:29,615 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:29" (1/1) ... [2024-11-09 04:29:29,615 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:29" (1/1) ... [2024-11-09 04:29:29,621 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:29" (1/1) ... [2024-11-09 04:29:29,625 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:29" (1/1) ... [2024-11-09 04:29:29,626 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:29" (1/1) ... [2024-11-09 04:29:29,627 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:29" (1/1) ... [2024-11-09 04:29:29,631 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:29:29,632 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:29:29,633 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:29:29,633 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:29:29,634 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:29" (1/1) ... [2024-11-09 04:29:29,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:29:29,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:29,668 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:29:29,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:29:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:29:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 04:29:29,706 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 04:29:29,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 04:29:29,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 04:29:29,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 04:29:29,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:29:29,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:29:29,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 04:29:29,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 04:29:29,802 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:29:29,804 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:29:30,030 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-11-09 04:29:30,030 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:29:30,107 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:29:30,110 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 04:29:30,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:29:30 BoogieIcfgContainer [2024-11-09 04:29:30,111 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:29:30,114 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:29:30,116 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:29:30,119 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:29:30,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:29:29" (1/3) ... [2024-11-09 04:29:30,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70eb89e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:29:30, skipping insertion in model container [2024-11-09 04:29:30,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:29" (2/3) ... [2024-11-09 04:29:30,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70eb89e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:29:30, skipping insertion in model container [2024-11-09 04:29:30,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:29:30" (3/3) ... [2024-11-09 04:29:30,126 INFO L112 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2024-11-09 04:29:30,147 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:29:30,147 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 04:29:30,232 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:29:30,240 INFO L333 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, 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;@72a4cdbe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:29:30,241 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 04:29:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 04:29:30,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 04:29:30,257 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:30,258 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:30,258 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:30,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:30,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1215030868, now seen corresponding path program 1 times [2024-11-09 04:29:30,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:30,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567162861] [2024-11-09 04:29:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:30,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:30,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:30,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567162861] [2024-11-09 04:29:30,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567162861] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:30,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:30,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:29:30,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625304638] [2024-11-09 04:29:30,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:30,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 04:29:30,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:30,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 04:29:30,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 04:29:30,565 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 04:29:30,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:30,663 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2024-11-09 04:29:30,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 04:29:30,666 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-09 04:29:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:30,674 INFO L225 Difference]: With dead ends: 35 [2024-11-09 04:29:30,674 INFO L226 Difference]: Without dead ends: 24 [2024-11-09 04:29:30,678 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 04:29:30,682 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:30,686 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:30,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-09 04:29:30,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-09 04:29:30,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 04:29:30,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2024-11-09 04:29:30,727 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 13 [2024-11-09 04:29:30,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:30,729 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2024-11-09 04:29:30,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 04:29:30,730 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2024-11-09 04:29:30,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 04:29:30,733 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:30,733 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 04:29:30,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:29:30,735 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:30,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:30,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1039444348, now seen corresponding path program 1 times [2024-11-09 04:29:30,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:30,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348444477] [2024-11-09 04:29:30,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:30,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:29:31,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:31,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348444477] [2024-11-09 04:29:31,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348444477] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:31,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:31,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:29:31,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418166289] [2024-11-09 04:29:31,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:31,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:29:31,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:31,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:29:31,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:29:31,137 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 04:29:31,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:31,169 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2024-11-09 04:29:31,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:29:31,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2024-11-09 04:29:31,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:31,170 INFO L225 Difference]: With dead ends: 30 [2024-11-09 04:29:31,170 INFO L226 Difference]: Without dead ends: 26 [2024-11-09 04:29:31,171 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:29:31,172 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:31,173 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:29:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-09 04:29:31,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-09 04:29:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 04:29:31,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2024-11-09 04:29:31,181 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 29 [2024-11-09 04:29:31,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:31,181 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2024-11-09 04:29:31,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 04:29:31,182 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2024-11-09 04:29:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-09 04:29:31,183 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:31,183 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 04:29:31,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 04:29:31,183 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:31,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:31,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1617111689, now seen corresponding path program 1 times [2024-11-09 04:29:31,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:31,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946837186] [2024-11-09 04:29:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:31,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:29:31,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:31,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946837186] [2024-11-09 04:29:31,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946837186] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:31,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:31,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:29:31,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950105140] [2024-11-09 04:29:31,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:31,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:29:31,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:31,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:29:31,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:29:31,400 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 04:29:31,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:31,571 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2024-11-09 04:29:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:29:31,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-11-09 04:29:31,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:31,574 INFO L225 Difference]: With dead ends: 49 [2024-11-09 04:29:31,575 INFO L226 Difference]: Without dead ends: 28 [2024-11-09 04:29:31,575 INFO L431 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 [2024-11-09 04:29:31,578 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:31,582 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 61 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:31,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-09 04:29:31,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-09 04:29:31,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 04:29:31,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2024-11-09 04:29:31,593 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 31 [2024-11-09 04:29:31,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:31,594 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2024-11-09 04:29:31,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 04:29:31,594 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2024-11-09 04:29:31,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 04:29:31,600 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:31,600 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 04:29:31,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 04:29:31,600 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:31,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:31,601 INFO L85 PathProgramCache]: Analyzing trace with hash 552843342, now seen corresponding path program 1 times [2024-11-09 04:29:31,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:31,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517449200] [2024-11-09 04:29:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:31,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:29:31,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244722408] [2024-11-09 04:29:31,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:31,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:31,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:31,713 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:31,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:29:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:31,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 04:29:31,918 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:32,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:29:32,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2024-11-09 04:29:32,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 04:29:33,558 INFO L349 Elim1Store]: treesize reduction 58, result has 47.7 percent of original size [2024-11-09 04:29:33,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 78 [2024-11-09 04:29:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:29:33,840 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:34,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:34,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517449200] [2024-11-09 04:29:34,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:29:34,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244722408] [2024-11-09 04:29:34,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244722408] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:34,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1912329631] [2024-11-09 04:29:34,822 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 04:29:34,822 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:34,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:34,833 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:34,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:36,654 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-09 04:29:36,657 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:29:39,219 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '481#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-09 04:29:39,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:29:39,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:29:39,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-09 04:29:39,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910796242] [2024-11-09 04:29:39,221 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:39,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 04:29:39,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:39,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 04:29:39,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1480, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 04:29:39,224 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-09 04:29:39,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:39,919 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2024-11-09 04:29:39,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 04:29:39,920 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 33 [2024-11-09 04:29:39,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:39,921 INFO L225 Difference]: With dead ends: 77 [2024-11-09 04:29:39,921 INFO L226 Difference]: Without dead ends: 73 [2024-11-09 04:29:39,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=305, Invalid=1857, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 04:29:39,924 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:39,926 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 116 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:29:39,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-09 04:29:39,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2024-11-09 04:29:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 43 states have internal predecessors, (49), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-09 04:29:39,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2024-11-09 04:29:39,958 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 33 [2024-11-09 04:29:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:39,959 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2024-11-09 04:29:39,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-09 04:29:39,963 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2024-11-09 04:29:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 04:29:39,964 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:39,964 INFO L215 NwaCegarLoop]: trace histogram [5, 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] [2024-11-09 04:29:39,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 04:29:40,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:40,165 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:40,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:40,166 INFO L85 PathProgramCache]: Analyzing trace with hash -6821677, now seen corresponding path program 2 times [2024-11-09 04:29:40,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:40,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790157045] [2024-11-09 04:29:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:40,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:29:40,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:40,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790157045] [2024-11-09 04:29:40,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790157045] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:40,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035395783] [2024-11-09 04:29:40,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:29:40,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:40,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:40,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:40,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:29:40,454 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 04:29:40,454 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:29:40,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:29:40,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:29:40,547 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:29:40,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035395783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:40,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [795918743] [2024-11-09 04:29:40,653 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 04:29:40,653 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:40,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:40,653 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:40,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:41,923 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-09 04:29:41,928 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:29:43,769 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '939#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-09 04:29:43,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:29:43,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:43,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-09 04:29:43,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425583454] [2024-11-09 04:29:43,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:43,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 04:29:43,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:43,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 04:29:43,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2024-11-09 04:29:43,772 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:29:44,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:44,292 INFO L93 Difference]: Finished difference Result 141 states and 182 transitions. [2024-11-09 04:29:44,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 04:29:44,294 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 35 [2024-11-09 04:29:44,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:44,296 INFO L225 Difference]: With dead ends: 141 [2024-11-09 04:29:44,297 INFO L226 Difference]: Without dead ends: 87 [2024-11-09 04:29:44,298 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 04:29:44,299 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 18 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:44,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 129 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:29:44,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-09 04:29:44,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2024-11-09 04:29:44,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-09 04:29:44,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2024-11-09 04:29:44,316 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 35 [2024-11-09 04:29:44,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:44,317 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2024-11-09 04:29:44,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:29:44,317 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2024-11-09 04:29:44,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 04:29:44,319 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:44,319 INFO L215 NwaCegarLoop]: trace histogram [5, 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] [2024-11-09 04:29:44,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 04:29:44,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:44,520 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:44,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:44,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1497742893, now seen corresponding path program 3 times [2024-11-09 04:29:44,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:44,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397762316] [2024-11-09 04:29:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:44,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:29:44,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:44,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397762316] [2024-11-09 04:29:44,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397762316] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:44,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629170187] [2024-11-09 04:29:44,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:29:44,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:44,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:44,736 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:44,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:29:44,810 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:29:44,811 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:29:44,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:29:44,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:29:44,902 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:29:44,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629170187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:44,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1430306518] [2024-11-09 04:29:44,993 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 04:29:44,993 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:44,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:44,994 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:44,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:46,097 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-09 04:29:46,099 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:29:48,308 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1499#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-09 04:29:48,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:29:48,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:48,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-09 04:29:48,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708533746] [2024-11-09 04:29:48,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:48,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 04:29:48,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:48,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 04:29:48,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2024-11-09 04:29:48,310 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:29:48,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:48,535 INFO L93 Difference]: Finished difference Result 92 states and 113 transitions. [2024-11-09 04:29:48,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 04:29:48,535 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 35 [2024-11-09 04:29:48,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:48,536 INFO L225 Difference]: With dead ends: 92 [2024-11-09 04:29:48,537 INFO L226 Difference]: Without dead ends: 82 [2024-11-09 04:29:48,537 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 04:29:48,538 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 37 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:48,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 119 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:29:48,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-09 04:29:48,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2024-11-09 04:29:48,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 46 states have internal predecessors, (50), 17 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-09 04:29:48,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2024-11-09 04:29:48,555 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 35 [2024-11-09 04:29:48,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:48,556 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2024-11-09 04:29:48,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:29:48,556 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2024-11-09 04:29:48,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-09 04:29:48,557 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:48,558 INFO L215 NwaCegarLoop]: trace histogram [5, 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] [2024-11-09 04:29:48,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 04:29:48,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 04:29:48,759 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:48,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:48,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1830053144, now seen corresponding path program 4 times [2024-11-09 04:29:48,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:48,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328656170] [2024-11-09 04:29:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:48,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:29:48,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345040634] [2024-11-09 04:29:48,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:29:48,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:48,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:48,834 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:48,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:29:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:48,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-09 04:29:48,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:48,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:29:49,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-09 04:29:49,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2024-11-09 04:29:50,753 INFO L349 Elim1Store]: treesize reduction 312, result has 24.5 percent of original size [2024-11-09 04:29:50,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 90 treesize of output 145 [2024-11-09 04:29:51,170 INFO L349 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2024-11-09 04:29:51,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 46 [2024-11-09 04:29:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 04:29:51,222 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:51,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:51,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328656170] [2024-11-09 04:29:51,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:29:51,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345040634] [2024-11-09 04:29:51,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345040634] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:51,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2060499813] [2024-11-09 04:29:51,657 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 04:29:51,657 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:51,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:51,658 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:51,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:52,765 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-09 04:29:52,774 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:29:55,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1783#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-09 04:29:55,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:29:55,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:29:55,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-09 04:29:55,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623474238] [2024-11-09 04:29:55,188 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:55,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 04:29:55,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:55,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 04:29:55,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 04:29:55,190 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 20 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-09 04:29:56,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:56,683 INFO L93 Difference]: Finished difference Result 112 states and 140 transitions. [2024-11-09 04:29:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 04:29:56,684 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2024-11-09 04:29:56,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:56,686 INFO L225 Difference]: With dead ends: 112 [2024-11-09 04:29:56,686 INFO L226 Difference]: Without dead ends: 108 [2024-11-09 04:29:56,687 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=389, Invalid=2473, Unknown=0, NotChecked=0, Total=2862 [2024-11-09 04:29:56,688 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 63 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:56,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 172 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 04:29:56,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-09 04:29:56,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2024-11-09 04:29:56,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 58 states have internal predecessors, (64), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-09 04:29:56,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 106 transitions. [2024-11-09 04:29:56,719 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 106 transitions. Word has length 37 [2024-11-09 04:29:56,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:56,720 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 106 transitions. [2024-11-09 04:29:56,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-09 04:29:56,720 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 106 transitions. [2024-11-09 04:29:56,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 04:29:56,721 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:56,721 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:56,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 04:29:56,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 04:29:56,924 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:56,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:56,925 INFO L85 PathProgramCache]: Analyzing trace with hash 91409181, now seen corresponding path program 5 times [2024-11-09 04:29:56,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:56,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757114518] [2024-11-09 04:29:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:56,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:29:57,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:57,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757114518] [2024-11-09 04:29:57,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757114518] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:57,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967705434] [2024-11-09 04:29:57,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:29:57,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:57,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:57,198 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:57,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 04:29:57,311 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 04:29:57,312 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:29:57,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 04:29:57,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:29:57,403 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:29:57,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967705434] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:57,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1641111232] [2024-11-09 04:29:57,494 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 04:29:57,494 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:57,495 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:57,495 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:57,495 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:58,421 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-09 04:29:58,423 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:00,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2549#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-09 04:30:00,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:00,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:30:00,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-09 04:30:00,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339046731] [2024-11-09 04:30:00,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:00,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 04:30:00,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:00,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 04:30:00,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 04:30:00,164 INFO L87 Difference]: Start difference. First operand 85 states and 106 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:30:00,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:00,594 INFO L93 Difference]: Finished difference Result 144 states and 183 transitions. [2024-11-09 04:30:00,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 04:30:00,594 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 39 [2024-11-09 04:30:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:00,596 INFO L225 Difference]: With dead ends: 144 [2024-11-09 04:30:00,596 INFO L226 Difference]: Without dead ends: 140 [2024-11-09 04:30:00,596 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 04:30:00,597 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 41 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:00,597 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 190 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:30:00,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-09 04:30:00,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2024-11-09 04:30:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 63 states have (on average 1.126984126984127) internal successors, (71), 64 states have internal predecessors, (71), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-09 04:30:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 121 transitions. [2024-11-09 04:30:00,629 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 121 transitions. Word has length 39 [2024-11-09 04:30:00,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:00,630 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 121 transitions. [2024-11-09 04:30:00,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:30:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 121 transitions. [2024-11-09 04:30:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 04:30:00,632 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:00,632 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:00,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 04:30:00,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:00,833 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:00,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:00,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1835197469, now seen corresponding path program 6 times [2024-11-09 04:30:00,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:00,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508222099] [2024-11-09 04:30:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:00,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:30:00,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:00,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508222099] [2024-11-09 04:30:00,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508222099] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:00,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756086941] [2024-11-09 04:30:00,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:30:00,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:00,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:00,989 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:00,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 04:30:01,078 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:30:01,078 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:30:01,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 04:30:01,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:30:01,173 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:30:01,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756086941] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:01,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [320055287] [2024-11-09 04:30:01,261 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 04:30:01,261 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:01,261 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:01,262 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:01,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:02,201 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-09 04:30:02,203 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:03,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3197#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-09 04:30:03,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:03,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:30:03,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-09 04:30:03,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761884673] [2024-11-09 04:30:03,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:03,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 04:30:03,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:03,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 04:30:03,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 04:30:03,982 INFO L87 Difference]: Start difference. First operand 96 states and 121 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:30:04,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:04,429 INFO L93 Difference]: Finished difference Result 166 states and 214 transitions. [2024-11-09 04:30:04,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 04:30:04,430 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 39 [2024-11-09 04:30:04,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:04,432 INFO L225 Difference]: With dead ends: 166 [2024-11-09 04:30:04,432 INFO L226 Difference]: Without dead ends: 154 [2024-11-09 04:30:04,433 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 04:30:04,433 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 44 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:04,434 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 172 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:30:04,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-09 04:30:04,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 98. [2024-11-09 04:30:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 66 states have internal predecessors, (72), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-09 04:30:04,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2024-11-09 04:30:04,463 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 39 [2024-11-09 04:30:04,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:04,463 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2024-11-09 04:30:04,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:30:04,464 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2024-11-09 04:30:04,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 04:30:04,465 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:04,465 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:04,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 04:30:04,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:04,666 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:04,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:04,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1740627170, now seen corresponding path program 7 times [2024-11-09 04:30:04,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:04,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635906260] [2024-11-09 04:30:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:04,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:30:04,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410464454] [2024-11-09 04:30:04,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:30:04,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:04,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:04,752 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:04,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 04:30:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:04,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-09 04:30:04,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:04,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:30:04,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-09 04:30:05,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2024-11-09 04:30:05,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2024-11-09 04:30:07,308 INFO L349 Elim1Store]: treesize reduction 468, result has 24.4 percent of original size [2024-11-09 04:30:07,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 48 case distinctions, treesize of input 118 treesize of output 207 [2024-11-09 04:30:08,413 INFO L349 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2024-11-09 04:30:08,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 164 treesize of output 80 [2024-11-09 04:30:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 04:30:08,491 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:09,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:09,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635906260] [2024-11-09 04:30:09,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:30:09,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410464454] [2024-11-09 04:30:09,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410464454] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:09,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1356758971] [2024-11-09 04:30:09,167 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 04:30:09,167 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:09,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:09,168 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:09,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:09,860 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-09 04:30:09,866 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:12,318 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3843#(and (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (<= 1 ~ARR_SIZE~0))' at error location [2024-11-09 04:30:12,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:12,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:30:12,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-11-09 04:30:12,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631936341] [2024-11-09 04:30:12,319 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:12,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 04:30:12,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:12,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 04:30:12,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2036, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 04:30:12,322 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand has 22 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-09 04:30:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:14,648 INFO L93 Difference]: Finished difference Result 146 states and 182 transitions. [2024-11-09 04:30:14,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 04:30:14,650 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2024-11-09 04:30:14,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:14,651 INFO L225 Difference]: With dead ends: 146 [2024-11-09 04:30:14,651 INFO L226 Difference]: Without dead ends: 142 [2024-11-09 04:30:14,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=442, Invalid=2980, Unknown=0, NotChecked=0, Total=3422 [2024-11-09 04:30:14,653 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 71 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:14,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 157 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-09 04:30:14,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-09 04:30:14,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 115. [2024-11-09 04:30:14,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 78 states have internal predecessors, (86), 29 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-09 04:30:14,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 144 transitions. [2024-11-09 04:30:14,710 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 144 transitions. Word has length 41 [2024-11-09 04:30:14,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:14,711 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 144 transitions. [2024-11-09 04:30:14,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-09 04:30:14,714 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 144 transitions. [2024-11-09 04:30:14,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 04:30:14,715 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:14,715 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:14,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 04:30:14,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:14,916 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:14,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:14,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1052883047, now seen corresponding path program 8 times [2024-11-09 04:30:14,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:14,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485411799] [2024-11-09 04:30:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:14,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:30:15,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:15,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485411799] [2024-11-09 04:30:15,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485411799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:15,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693113886] [2024-11-09 04:30:15,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:30:15,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:15,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:15,170 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:15,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 04:30:15,278 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 04:30:15,278 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:30:15,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 04:30:15,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:30:15,387 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:30:15,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693113886] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:15,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [753202000] [2024-11-09 04:30:15,498 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 04:30:15,498 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:15,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:15,499 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:15,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:16,346 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-09 04:30:16,348 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:17,971 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4561#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-09 04:30:17,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:17,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:30:17,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-09 04:30:17,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314319804] [2024-11-09 04:30:17,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:17,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 04:30:17,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:17,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 04:30:17,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 04:30:17,974 INFO L87 Difference]: Start difference. First operand 115 states and 144 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:30:18,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:18,707 INFO L93 Difference]: Finished difference Result 191 states and 243 transitions. [2024-11-09 04:30:18,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 04:30:18,707 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 43 [2024-11-09 04:30:18,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:18,710 INFO L225 Difference]: With dead ends: 191 [2024-11-09 04:30:18,710 INFO L226 Difference]: Without dead ends: 187 [2024-11-09 04:30:18,711 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 94 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=376, Invalid=1786, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 04:30:18,712 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 65 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:18,712 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 218 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:30:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-11-09 04:30:18,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 126. [2024-11-09 04:30:18,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 84 states have internal predecessors, (93), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-09 04:30:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 159 transitions. [2024-11-09 04:30:18,763 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 159 transitions. Word has length 43 [2024-11-09 04:30:18,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:18,763 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 159 transitions. [2024-11-09 04:30:18,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:30:18,764 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 159 transitions. [2024-11-09 04:30:18,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 04:30:18,765 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:18,765 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:18,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 04:30:18,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:18,966 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:18,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:18,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1796182375, now seen corresponding path program 9 times [2024-11-09 04:30:18,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:18,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607456274] [2024-11-09 04:30:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:18,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:30:19,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:19,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607456274] [2024-11-09 04:30:19,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607456274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:19,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397298159] [2024-11-09 04:30:19,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:30:19,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:19,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:19,207 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:19,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 04:30:19,332 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:30:19,332 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:30:19,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 04:30:19,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:30:19,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:30:19,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397298159] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:19,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1448462991] [2024-11-09 04:30:19,590 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 04:30:19,590 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:19,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:19,591 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:19,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:20,443 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-09 04:30:20,445 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:22,547 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5360#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-09 04:30:22,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:22,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:30:22,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-09 04:30:22,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760227006] [2024-11-09 04:30:22,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:22,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 04:30:22,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:22,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 04:30:22,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1161, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 04:30:22,550 INFO L87 Difference]: Start difference. First operand 126 states and 159 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:30:23,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:23,143 INFO L93 Difference]: Finished difference Result 261 states and 346 transitions. [2024-11-09 04:30:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 04:30:23,144 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 43 [2024-11-09 04:30:23,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:23,146 INFO L225 Difference]: With dead ends: 261 [2024-11-09 04:30:23,146 INFO L226 Difference]: Without dead ends: 247 [2024-11-09 04:30:23,147 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 95 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=278, Invalid=1362, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 04:30:23,148 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 103 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:23,148 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 175 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:30:23,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-09 04:30:23,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 128. [2024-11-09 04:30:23,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 86 states have internal predecessors, (94), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-09 04:30:23,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 160 transitions. [2024-11-09 04:30:23,217 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 160 transitions. Word has length 43 [2024-11-09 04:30:23,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:23,218 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 160 transitions. [2024-11-09 04:30:23,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:30:23,219 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 160 transitions. [2024-11-09 04:30:23,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 04:30:23,220 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:23,220 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:23,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 04:30:23,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 04:30:23,424 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:23,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:23,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1995923540, now seen corresponding path program 10 times [2024-11-09 04:30:23,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:23,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976199726] [2024-11-09 04:30:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:23,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:30:23,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718475039] [2024-11-09 04:30:23,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:30:23,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:23,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:23,496 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:23,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 04:30:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:23,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-11-09 04:30:23,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:23,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:30:23,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-09 04:30:23,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2024-11-09 04:30:23,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2024-11-09 04:30:24,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 75 [2024-11-09 04:30:27,071 INFO L349 Elim1Store]: treesize reduction 624, result has 24.4 percent of original size [2024-11-09 04:30:27,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 9 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 80 case distinctions, treesize of input 146 treesize of output 269 [2024-11-09 04:30:29,482 INFO L349 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2024-11-09 04:30:29,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 252 treesize of output 120 [2024-11-09 04:30:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 04:30:29,565 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:31,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:31,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976199726] [2024-11-09 04:30:31,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:30:31,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718475039] [2024-11-09 04:30:31,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718475039] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:31,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [86790123] [2024-11-09 04:30:31,259 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 04:30:31,259 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:31,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:31,259 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:31,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:32,068 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-09 04:30:32,071 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:35,574 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6002#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-09 04:30:35,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:35,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:30:35,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-11-09 04:30:35,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975771186] [2024-11-09 04:30:35,575 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:35,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 04:30:35,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:35,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 04:30:35,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=2750, Unknown=0, NotChecked=0, Total=3080 [2024-11-09 04:30:35,578 INFO L87 Difference]: Start difference. First operand 128 states and 160 transitions. Second operand has 26 states, 21 states have (on average 1.619047619047619) internal successors, (34), 23 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 04:30:38,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:38,855 INFO L93 Difference]: Finished difference Result 181 states and 225 transitions. [2024-11-09 04:30:38,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 04:30:38,856 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.619047619047619) internal successors, (34), 23 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2024-11-09 04:30:38,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:38,857 INFO L225 Difference]: With dead ends: 181 [2024-11-09 04:30:38,857 INFO L226 Difference]: Without dead ends: 177 [2024-11-09 04:30:38,858 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=493, Invalid=4063, Unknown=0, NotChecked=0, Total=4556 [2024-11-09 04:30:38,858 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 75 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:38,859 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 178 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-09 04:30:38,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-09 04:30:38,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 145. [2024-11-09 04:30:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 97 states have (on average 1.1134020618556701) internal successors, (108), 98 states have internal predecessors, (108), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-09 04:30:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 182 transitions. [2024-11-09 04:30:38,918 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 182 transitions. Word has length 45 [2024-11-09 04:30:38,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:38,919 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 182 transitions. [2024-11-09 04:30:38,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.619047619047619) internal successors, (34), 23 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 04:30:38,919 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 182 transitions. [2024-11-09 04:30:38,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 04:30:38,920 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:38,920 INFO L215 NwaCegarLoop]: trace histogram [9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:38,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 04:30:39,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 04:30:39,121 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:39,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:39,122 INFO L85 PathProgramCache]: Analyzing trace with hash 687440952, now seen corresponding path program 1 times [2024-11-09 04:30:39,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:39,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181106012] [2024-11-09 04:30:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:39,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:30:39,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653006255] [2024-11-09 04:30:39,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:39,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:39,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:39,163 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:39,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 04:30:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:39,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 04:30:39,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:39,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:30:39,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 38 [2024-11-09 04:30:39,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-09 04:30:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 42 proven. 35 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 04:30:40,815 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:40,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:40,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181106012] [2024-11-09 04:30:40,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:30:40,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653006255] [2024-11-09 04:30:40,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653006255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:40,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1650673231] [2024-11-09 04:30:40,996 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 04:30:40,996 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:40,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:40,997 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:40,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:45,105 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-09 04:30:45,106 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:45,524 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_main_~count~0#1| 1))) (and (let ((.cse5 (<= 1 c_~ARR_SIZE~0))) (or (and .cse0 (exists ((|v_ULTIMATE.start_main_~count~0#1_270| Int)) (let ((.cse6 (= |c_ULTIMATE.start_main_~#array2~0#1.offset| 0)) (.cse7 (= |c_ULTIMATE.start_main_~#array1~0#1.offset| 0)) (.cse9 (= |c_ULTIMATE.start_main_~sum~0#1| 0))) (and (let ((.cse1 (= (+ |c_ULTIMATE.start_main_~num~0#1| 1) 0)) (.cse2 (<= 1 |c_#StackHeapBarrier|)) (.cse3 (<= c_~ARR_SIZE~0 32767)) (.cse4 (<= 2 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse8 (<= 2 |c_ULTIMATE.start_main_~#array1~0#1.base|))) (or (and .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 (<= 1 |v_ULTIMATE.start_main_~count~0#1_270|) .cse9) (and (<= 0 |v_ULTIMATE.start_main_~count~0#1_270|) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9))) (or (and .cse6 .cse7 (= |v_ULTIMATE.start_main_~count~0#1_270| 0) .cse9) (and .cse6 .cse7 .cse9)) (<= c_~ARR_SIZE~0 |v_ULTIMATE.start_main_~count~0#1_270|))))) (and (exists ((|v_#memory_int_107| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~index1~0#1_53| Int) (|v_ULTIMATE.start_main_~index2~0#1_66| Int) (|v_ULTIMATE.start_main_~count~0#1_274| Int)) (let ((.cse10 (select |v_#memory_int_107| |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse11 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* |v_ULTIMATE.start_main_~index1~0#1_53| 4))) (.cse13 (+ (* |v_ULTIMATE.start_main_~index2~0#1_66| 4) |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (and (<= 1 |v_ULTIMATE.start_main_~count~0#1_274|) (= (select .cse10 .cse11) 0) (<= 0 |v_ULTIMATE.start_main_~index1~0#1_53|) (= (let ((.cse14 (* |c_ULTIMATE.start_main_~num~0#1| |v_ULTIMATE.start_main_~count~0#1_274|))) (let ((.cse12 (store |v_#memory_int_107| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse10 .cse11 (* |c_ULTIMATE.start_main_~num~0#1| .cse14))))) (store .cse12 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse12 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse13 .cse14)))) |c_#memory_int|) (= (select (select |v_#memory_int_107| |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse13) 0) (let ((.cse15 (= 200 |v_ULTIMATE.start_main_~count~0#1_274|))) (or (and (= (+ |v_ULTIMATE.start_main_~count~0#1_274| 1) |c_ULTIMATE.start_main_~count~0#1|) (not .cse15)) (and .cse15 .cse0))) (<= 0 |v_ULTIMATE.start_main_~index2~0#1_66|) (<= |v_ULTIMATE.start_main_~index2~0#1_66| 32767) (<= |v_ULTIMATE.start_main_~index1~0#1_53| 32767)))) (exists ((|v_ULTIMATE.start_main_~temp~0#1_45| Int)) (and (not (= |v_ULTIMATE.start_main_~temp~0#1_45| 0)) (<= |v_ULTIMATE.start_main_~temp~0#1_45| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~temp~0#1_45| 2147483648)))) .cse5))) (or .cse0 (< 0 c_~ARR_SIZE~0)))) is different from true [2024-11-09 04:30:46,780 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6781#true' at error location [2024-11-09 04:30:46,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:46,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:30:46,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-09 04:30:46,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006109612] [2024-11-09 04:30:46,781 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:46,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 04:30:46,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:46,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 04:30:46,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1469, Unknown=37, NotChecked=78, Total=1722 [2024-11-09 04:30:46,784 INFO L87 Difference]: Start difference. First operand 145 states and 182 transitions. Second operand has 21 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 7 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-09 04:30:49,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:49,155 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2024-11-09 04:30:49,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 04:30:49,155 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 7 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 50 [2024-11-09 04:30:49,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:49,157 INFO L225 Difference]: With dead ends: 160 [2024-11-09 04:30:49,157 INFO L226 Difference]: Without dead ends: 112 [2024-11-09 04:30:49,160 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=247, Invalid=2404, Unknown=109, NotChecked=102, Total=2862 [2024-11-09 04:30:49,160 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 9 mSolverCounterUnsat, 83 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 83 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:49,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 180 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 356 Invalid, 83 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 04:30:49,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-09 04:30:49,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2024-11-09 04:30:49,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 79 states have (on average 1.1139240506329113) internal successors, (88), 79 states have internal predecessors, (88), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-09 04:30:49,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2024-11-09 04:30:49,229 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 50 [2024-11-09 04:30:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:49,230 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2024-11-09 04:30:49,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 7 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-09 04:30:49,230 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2024-11-09 04:30:49,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 04:30:49,232 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:49,232 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:49,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 04:30:49,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 04:30:49,433 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:49,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:49,433 INFO L85 PathProgramCache]: Analyzing trace with hash 217526449, now seen corresponding path program 11 times [2024-11-09 04:30:49,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:49,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242358573] [2024-11-09 04:30:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:49,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:30:49,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:49,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242358573] [2024-11-09 04:30:49,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242358573] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:49,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191216550] [2024-11-09 04:30:49,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:30:49,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:49,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:49,787 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:49,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 04:30:49,958 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-09 04:30:49,959 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:30:49,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 04:30:49,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:30:50,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:30:50,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191216550] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:50,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [315828882] [2024-11-09 04:30:50,218 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 04:30:50,219 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:50,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:50,219 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:50,219 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:50,942 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-09 04:30:50,944 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:52,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7769#(and (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (<= 1 ~ARR_SIZE~0))' at error location [2024-11-09 04:30:52,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:52,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:30:52,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-09 04:30:52,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052847906] [2024-11-09 04:30:52,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:52,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 04:30:52,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:52,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 04:30:52,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1364, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 04:30:52,529 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:30:53,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:53,735 INFO L93 Difference]: Finished difference Result 204 states and 258 transitions. [2024-11-09 04:30:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 04:30:53,735 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 47 [2024-11-09 04:30:53,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:53,737 INFO L225 Difference]: With dead ends: 204 [2024-11-09 04:30:53,737 INFO L226 Difference]: Without dead ends: 200 [2024-11-09 04:30:53,738 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 103 SyntacticMatches, 10 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=403, Invalid=2249, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 04:30:53,738 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 98 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:53,739 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 309 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 04:30:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-11-09 04:30:53,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 123. [2024-11-09 04:30:53,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 85 states have internal predecessors, (95), 29 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-09 04:30:53,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 153 transitions. [2024-11-09 04:30:53,832 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 153 transitions. Word has length 47 [2024-11-09 04:30:53,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:53,833 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 153 transitions. [2024-11-09 04:30:53,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:30:53,833 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 153 transitions. [2024-11-09 04:30:53,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 04:30:53,835 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:53,835 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:53,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 04:30:54,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 04:30:54,036 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:54,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:54,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1563609521, now seen corresponding path program 12 times [2024-11-09 04:30:54,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:54,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769275004] [2024-11-09 04:30:54,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:54,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:30:54,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:54,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769275004] [2024-11-09 04:30:54,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769275004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:54,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497989589] [2024-11-09 04:30:54,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:30:54,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:54,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:54,314 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:54,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 04:30:54,497 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:30:54,497 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:30:54,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 04:30:54,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:30:54,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:30:54,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497989589] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:54,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [105783870] [2024-11-09 04:30:54,823 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 04:30:54,823 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:54,823 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:54,824 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:54,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:55,584 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-09 04:30:55,587 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:57,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8609#(and (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (<= 1 ~ARR_SIZE~0))' at error location [2024-11-09 04:30:57,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:57,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:30:57,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-09 04:30:57,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207583258] [2024-11-09 04:30:57,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:57,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 04:30:57,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:57,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 04:30:57,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 04:30:57,057 INFO L87 Difference]: Start difference. First operand 123 states and 153 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:30:57,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:57,792 INFO L93 Difference]: Finished difference Result 311 states and 417 transitions. [2024-11-09 04:30:57,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 04:30:57,793 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 47 [2024-11-09 04:30:57,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:57,794 INFO L225 Difference]: With dead ends: 311 [2024-11-09 04:30:57,794 INFO L226 Difference]: Without dead ends: 295 [2024-11-09 04:30:57,795 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=329, Invalid=1651, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 04:30:57,796 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 156 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:57,796 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 214 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:30:57,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-11-09 04:30:57,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 125. [2024-11-09 04:30:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 87 states have (on average 1.103448275862069) internal successors, (96), 87 states have internal predecessors, (96), 29 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-09 04:30:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 154 transitions. [2024-11-09 04:30:57,880 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 154 transitions. Word has length 47 [2024-11-09 04:30:57,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:57,881 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 154 transitions. [2024-11-09 04:30:57,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:30:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 154 transitions. [2024-11-09 04:30:57,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 04:30:57,882 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:57,882 INFO L215 NwaCegarLoop]: trace histogram [5, 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] [2024-11-09 04:30:57,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 04:30:58,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 04:30:58,085 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:58,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:58,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1614729866, now seen corresponding path program 13 times [2024-11-09 04:30:58,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:58,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759100872] [2024-11-09 04:30:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:58,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:30:58,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435405275] [2024-11-09 04:30:58,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:30:58,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:58,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:58,160 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:58,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 04:30:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:58,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-09 04:30:58,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:58,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:30:58,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-09 04:30:58,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2024-11-09 04:30:58,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2024-11-09 04:30:58,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 75 [2024-11-09 04:30:59,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2024-11-09 04:31:02,396 INFO L349 Elim1Store]: treesize reduction 780, result has 24.3 percent of original size [2024-11-09 04:31:02,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 20 select indices, 20 select index equivalence classes, 13 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 120 case distinctions, treesize of input 174 treesize of output 331 [2024-11-09 04:31:06,232 INFO L349 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2024-11-09 04:31:06,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 354 treesize of output 166 [2024-11-09 04:31:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 04:31:06,344 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:31:07,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:07,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759100872] [2024-11-09 04:31:07,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:31:07,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435405275] [2024-11-09 04:31:07,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435405275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:31:07,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [488019759] [2024-11-09 04:31:07,540 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 04:31:07,541 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:31:07,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:31:07,541 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:31:07,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:31:08,414 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2024-11-09 04:31:08,416 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:31:11,715 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9320#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-09 04:31:11,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:31:11,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:31:11,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-11-09 04:31:11,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178842403] [2024-11-09 04:31:11,716 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 04:31:11,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 04:31:11,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:11,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 04:31:11,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2651, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 04:31:11,718 INFO L87 Difference]: Start difference. First operand 125 states and 154 transitions. Second operand has 26 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-09 04:31:15,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:15,333 INFO L93 Difference]: Finished difference Result 179 states and 220 transitions. [2024-11-09 04:31:15,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 04:31:15,334 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 49 [2024-11-09 04:31:15,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:15,336 INFO L225 Difference]: With dead ends: 179 [2024-11-09 04:31:15,336 INFO L226 Difference]: Without dead ends: 175 [2024-11-09 04:31:15,336 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=460, Invalid=3962, Unknown=0, NotChecked=0, Total=4422 [2024-11-09 04:31:15,337 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 72 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:15,337 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 205 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-09 04:31:15,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-09 04:31:15,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 142. [2024-11-09 04:31:15,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 99 states have internal predecessors, (110), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-09 04:31:15,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 176 transitions. [2024-11-09 04:31:15,407 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 176 transitions. Word has length 49 [2024-11-09 04:31:15,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:15,408 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 176 transitions. [2024-11-09 04:31:15,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-09 04:31:15,408 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 176 transitions. [2024-11-09 04:31:15,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-09 04:31:15,409 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:15,409 INFO L215 NwaCegarLoop]: trace histogram [9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:15,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 04:31:15,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 04:31:15,610 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:31:15,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:15,611 INFO L85 PathProgramCache]: Analyzing trace with hash 715057816, now seen corresponding path program 2 times [2024-11-09 04:31:15,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:15,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11039312] [2024-11-09 04:31:15,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:15,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:31:15,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458926161] [2024-11-09 04:31:15,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:31:15,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:15,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:31:15,694 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:31:15,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 04:31:15,955 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 04:31:15,955 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:31:15,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-09 04:31:15,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:31:15,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:31:16,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2024-11-09 04:31:16,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 17 [2024-11-09 04:31:16,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-09 04:31:16,795 INFO L349 Elim1Store]: treesize reduction 71, result has 32.4 percent of original size [2024-11-09 04:31:16,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 62 [2024-11-09 04:32:23,258 WARN L286 SmtUtils]: Spent 21.41s on a formula simplification. DAG size of input: 1691 DAG size of output: 454 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-09 04:32:23,259 INFO L349 Elim1Store]: treesize reduction 5904, result has 19.8 percent of original size [2024-11-09 04:32:23,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 27 select indices, 27 select index equivalence classes, 2 disjoint index pairs (out of 351 index pairs), introduced 27 new quantified variables, introduced 370 case distinctions, treesize of input 443 treesize of output 1715 [2024-11-09 04:38:35,561 WARN L286 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 419 DAG size of output: 452 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:42:17,017 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-09 04:42:17,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:42:17,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11039312] [2024-11-09 04:42:17,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:42:17,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458926161] [2024-11-09 04:42:17,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2024-11-09 04:42:17,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [876466295] [2024-11-09 04:42:17,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2024-11-09 04:42:17,023 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 04:42:17,024 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:42:17,024 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:42:17,024 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:42:17,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:42:17,032 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:326) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:220) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 44 more [2024-11-09 04:42:17,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:42:17,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2024-11-09 04:42:17,036 ERROR L171 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2024-11-09 04:42:17,036 INFO L325 BasicCegarLoop]: Counterexample might be feasible [2024-11-09 04:42:17,044 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-09 04:42:17,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 04:42:17,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 04:42:17,255 INFO L407 BasicCegarLoop]: Path program histogram: [13, 2, 1, 1, 1] [2024-11-09 04:42:17,277 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 04:42:17,283 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 04:42:17 BoogieIcfgContainer [2024-11-09 04:42:17,284 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 04:42:17,284 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 04:42:17,284 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 04:42:17,285 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 04:42:17,285 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:29:30" (3/4) ... [2024-11-09 04:42:17,287 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-09 04:42:17,288 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 04:42:17,289 INFO L158 Benchmark]: Toolchain (without parser) took 768026.70ms. Allocated memory was 144.7MB in the beginning and 629.1MB in the end (delta: 484.4MB). Free memory was 106.8MB in the beginning and 579.9MB in the end (delta: -473.1MB). Peak memory consumption was 12.4MB. Max. memory is 16.1GB. [2024-11-09 04:42:17,289 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 117.4MB. Free memory is still 62.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 04:42:17,290 INFO L158 Benchmark]: CACSL2BoogieTranslator took 292.99ms. Allocated memory is still 144.7MB. Free memory was 106.8MB in the beginning and 93.7MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-09 04:42:17,290 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.00ms. Allocated memory is still 144.7MB. Free memory was 93.7MB in the beginning and 92.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 04:42:17,290 INFO L158 Benchmark]: Boogie Preprocessor took 32.56ms. Allocated memory is still 144.7MB. Free memory was 91.6MB in the beginning and 90.6MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 04:42:17,290 INFO L158 Benchmark]: RCFGBuilder took 479.04ms. Allocated memory is still 144.7MB. Free memory was 90.6MB in the beginning and 75.4MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-11-09 04:42:17,291 INFO L158 Benchmark]: TraceAbstraction took 767170.18ms. Allocated memory was 144.7MB in the beginning and 629.1MB in the end (delta: 484.4MB). Free memory was 74.8MB in the beginning and 580.3MB in the end (delta: -505.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 04:42:17,291 INFO L158 Benchmark]: Witness Printer took 4.25ms. Allocated memory is still 629.1MB. Free memory was 580.3MB in the beginning and 579.9MB in the end (delta: 409.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 04:42:17,293 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 117.4MB. Free memory is still 62.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 292.99ms. Allocated memory is still 144.7MB. Free memory was 106.8MB in the beginning and 93.7MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.00ms. Allocated memory is still 144.7MB. Free memory was 93.7MB in the beginning and 92.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.56ms. Allocated memory is still 144.7MB. Free memory was 91.6MB in the beginning and 90.6MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 479.04ms. Allocated memory is still 144.7MB. Free memory was 90.6MB in the beginning and 75.4MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 767170.18ms. Allocated memory was 144.7MB in the beginning and 629.1MB in the end (delta: 484.4MB). Free memory was 74.8MB in the beginning and 580.3MB in the end (delta: -505.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.25ms. Allocated memory is still 629.1MB. Free memory was 580.3MB in the beginning and 579.9MB in the end (delta: 409.4kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 40]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L44] signed long long ARR_SIZE ; [L48] ARR_SIZE = __VERIFIER_nondet_short() [L49] CALL assume_abort_if_not(ARR_SIZE > 0) [L38] COND TRUE !cond [L49] RET assume_abort_if_not(ARR_SIZE > 0) [L51] int array1[ARR_SIZE] ; [L52] int array2[ARR_SIZE] ; [L53] int count = 0, num = -1 ; [L54] signed long long sum = 0 ; [L55] int temp ; [L56] short index1,index2 ; [L58] count=0 [L58] COND FALSE !(count=0 && index1 < ARR_SIZE) [L38] COND TRUE !cond [L71] RET assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L72] CALL assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L38] COND TRUE !cond [L72] RET assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L73] EXPR array1[index1] [L73] CALL assume_abort_if_not(array1[index1] == 0) [L38] COND TRUE !cond [L73] RET assume_abort_if_not(array1[index1] == 0) [L74] EXPR array2[index2] [L74] CALL assume_abort_if_not(array2[index2] == 0) [L38] COND TRUE !cond [L74] RET assume_abort_if_not(array2[index2] == 0) [L76] array1[index1] = num * (num * count) [L77] array2[index2] = num * count [L78] COND FALSE !(count == 200) [L80] count++ [L82] temp = __VERIFIER_nondet_int() [L83] COND FALSE !(temp == 0) [L66] COND TRUE 1 [L69] index1 = __VERIFIER_nondet_short() [L70] index2 = __VERIFIER_nondet_short() [L71] CALL assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L38] COND TRUE !cond [L71] RET assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L72] CALL assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L38] COND TRUE !cond [L72] RET assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L73] EXPR array1[index1] [L73] CALL assume_abort_if_not(array1[index1] == 0) [L38] COND TRUE !cond [L73] RET assume_abort_if_not(array1[index1] == 0) [L74] EXPR array2[index2] [L74] CALL assume_abort_if_not(array2[index2] == 0) [L38] COND TRUE !cond [L74] RET assume_abort_if_not(array2[index2] == 0) [L76] array1[index1] = num * (num * count) [L77] array2[index2] = num * count [L78] COND FALSE !(count == 200) [L80] count++ [L82] temp = __VERIFIER_nondet_int() [L83] COND TRUE temp == 0 [L86] count=0 [L86] COND FALSE !(count main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje 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 -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2024-11-09 04:42:20,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:42:20,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:42:20,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:42:20,383 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:42:20,384 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:42:20,385 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-patterns/array4_pattern.c Unable to find full path for "g++" [2024-11-09 04:42:22,487 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:42:22,806 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:42:22,808 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/sv-benchmarks/c/array-patterns/array4_pattern.c [2024-11-09 04:42:22,819 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/data/34e567fb2/97b202806dc54173a2e429431650bd97/FLAG19684d680 [2024-11-09 04:42:22,843 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/data/34e567fb2/97b202806dc54173a2e429431650bd97 [2024-11-09 04:42:22,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:42:22,850 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:42:22,852 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:42:22,852 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:42:22,860 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:42:22,861 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:42:22" (1/1) ... [2024-11-09 04:42:22,862 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7864abdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:42:22, skipping insertion in model container [2024-11-09 04:42:22,865 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:42:22" (1/1) ... [2024-11-09 04:42:22,896 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:42:23,133 WARN L250 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_ffb78f86-62a5-467b-b394-9afb36fa5606/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2024-11-09 04:42:23,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:42:23,181 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:42:23,196 WARN L250 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_ffb78f86-62a5-467b-b394-9afb36fa5606/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2024-11-09 04:42:23,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:42:23,245 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:42:23,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:42:23 WrapperNode [2024-11-09 04:42:23,246 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:42:23,248 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:42:23,248 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:42:23,248 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:42:23,257 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:42:23" (1/1) ... [2024-11-09 04:42:23,269 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:42:23" (1/1) ... [2024-11-09 04:42:23,300 INFO L138 Inliner]: procedures = 18, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2024-11-09 04:42:23,302 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:42:23,303 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:42:23,304 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:42:23,304 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:42:23,314 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:42:23" (1/1) ... [2024-11-09 04:42:23,314 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:42:23" (1/1) ... [2024-11-09 04:42:23,320 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:42:23" (1/1) ... [2024-11-09 04:42:23,323 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:42:23" (1/1) ... [2024-11-09 04:42:23,331 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:42:23" (1/1) ... [2024-11-09 04:42:23,334 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:42:23" (1/1) ... [2024-11-09 04:42:23,336 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:42:23" (1/1) ... [2024-11-09 04:42:23,337 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:42:23" (1/1) ... [2024-11-09 04:42:23,339 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:42:23,340 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:42:23,341 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:42:23,341 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:42:23,342 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:42:23" (1/1) ... [2024-11-09 04:42:23,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:42:23,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:42:23,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:42:23,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:42:23,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:42:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2024-11-09 04:42:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 04:42:23,431 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 04:42:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 04:42:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2024-11-09 04:42:23,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:42:23,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:42:23,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 04:42:23,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2024-11-09 04:42:23,600 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:42:23,606 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:42:23,942 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-11-09 04:42:23,945 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:42:23,963 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:42:23,963 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 04:42:23,964 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:42:23 BoogieIcfgContainer [2024-11-09 04:42:23,964 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:42:23,965 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:42:23,966 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:42:23,968 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:42:23,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:42:22" (1/3) ... [2024-11-09 04:42:23,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee6fa98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:42:23, skipping insertion in model container [2024-11-09 04:42:23,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:42:23" (2/3) ... [2024-11-09 04:42:23,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee6fa98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:42:23, skipping insertion in model container [2024-11-09 04:42:23,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:42:23" (3/3) ... [2024-11-09 04:42:23,972 INFO L112 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2024-11-09 04:42:23,989 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:42:23,990 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 04:42:24,049 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:42:24,056 INFO L333 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, 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;@39fb0c7a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:42:24,056 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 04:42:24,061 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 04:42:24,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 04:42:24,070 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:42:24,071 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:42:24,071 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:42:24,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:42:24,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1964437580, now seen corresponding path program 1 times [2024-11-09 04:42:24,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:42:24,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007455478] [2024-11-09 04:42:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:42:24,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:42:24,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:42:24,104 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:42:24,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-09 04:42:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:42:24,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-09 04:42:24,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:42:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:42:24,290 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:42:24,291 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:42:24,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007455478] [2024-11-09 04:42:24,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007455478] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:42:24,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:42:24,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:42:24,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190998271] [2024-11-09 04:42:24,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:42:24,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 04:42:24,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:42:24,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 04:42:24,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 04:42:24,347 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 04:42:24,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:42:24,375 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2024-11-09 04:42:24,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 04:42:24,377 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-11-09 04:42:24,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:42:24,385 INFO L225 Difference]: With dead ends: 63 [2024-11-09 04:42:24,385 INFO L226 Difference]: Without dead ends: 29 [2024-11-09 04:42:24,389 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 04:42:24,393 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:42:24,394 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:42:24,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-09 04:42:24,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-09 04:42:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 04:42:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2024-11-09 04:42:24,442 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 16 [2024-11-09 04:42:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:42:24,444 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2024-11-09 04:42:24,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 04:42:24,446 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2024-11-09 04:42:24,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 04:42:24,449 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:42:24,449 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 04:42:24,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-09 04:42:24,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:42:24,653 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:42:24,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:42:24,655 INFO L85 PathProgramCache]: Analyzing trace with hash -962874614, now seen corresponding path program 1 times [2024-11-09 04:42:24,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:42:24,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161780865] [2024-11-09 04:42:24,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:42:24,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:42:24,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:42:24,662 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:42:24,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-09 04:42:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:42:24,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 04:42:24,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:42:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 04:42:24,932 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:42:24,933 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:42:24,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161780865] [2024-11-09 04:42:24,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161780865] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:42:24,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:42:24,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:42:24,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761912557] [2024-11-09 04:42:24,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:42:24,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:42:24,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:42:24,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:42:24,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:42:24,938 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 04:42:25,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:42:25,088 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2024-11-09 04:42:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:42:25,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2024-11-09 04:42:25,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:42:25,091 INFO L225 Difference]: With dead ends: 61 [2024-11-09 04:42:25,091 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 04:42:25,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:42:25,094 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:42:25,094 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 57 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:42:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 04:42:25,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-11-09 04:42:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 04:42:25,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2024-11-09 04:42:25,107 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 42 [2024-11-09 04:42:25,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:42:25,108 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2024-11-09 04:42:25,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 04:42:25,108 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2024-11-09 04:42:25,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 04:42:25,110 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:42:25,110 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 04:42:25,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-11-09 04:42:25,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:42:25,311 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:42:25,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:42:25,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1772221240, now seen corresponding path program 1 times [2024-11-09 04:42:25,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:42:25,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74417577] [2024-11-09 04:42:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:42:25,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:42:25,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:42:25,320 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:42:25,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-11-09 04:42:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:42:25,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 04:42:25,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:42:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 04:42:25,594 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:42:25,594 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:42:25,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74417577] [2024-11-09 04:42:25,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74417577] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:42:25,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:42:25,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:42:25,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488656902] [2024-11-09 04:42:25,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:42:25,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:42:25,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:42:25,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:42:25,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:42:25,603 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 04:42:25,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:42:25,660 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2024-11-09 04:42:25,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:42:25,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2024-11-09 04:42:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:42:25,666 INFO L225 Difference]: With dead ends: 44 [2024-11-09 04:42:25,666 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 04:42:25,666 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:42:25,671 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:42:25,672 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 86 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:42:25,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 04:42:25,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-09 04:42:25,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 04:42:25,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2024-11-09 04:42:25,695 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 42 [2024-11-09 04:42:25,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:42:25,696 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2024-11-09 04:42:25,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 04:42:25,698 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2024-11-09 04:42:25,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 04:42:25,701 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:42:25,701 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 04:42:25,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-11-09 04:42:25,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:42:25,902 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:42:25,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:42:25,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1793155021, now seen corresponding path program 1 times [2024-11-09 04:42:25,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:42:25,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742550512] [2024-11-09 04:42:25,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:42:25,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:42:25,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:42:25,908 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:42:25,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-11-09 04:42:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:42:26,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:42:26,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:42:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 04:42:26,295 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:42:26,295 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:42:26,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742550512] [2024-11-09 04:42:26,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742550512] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:42:26,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:42:26,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 04:42:26,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849756152] [2024-11-09 04:42:26,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:42:26,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:42:26,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:42:26,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:42:26,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:42:26,303 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 04:42:26,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:42:26,785 INFO L93 Difference]: Finished difference Result 81 states and 105 transitions. [2024-11-09 04:42:26,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:42:26,786 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-11-09 04:42:26,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:42:26,787 INFO L225 Difference]: With dead ends: 81 [2024-11-09 04:42:26,787 INFO L226 Difference]: Without dead ends: 47 [2024-11-09 04:42:26,788 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:42:26,789 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 35 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:42:26,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 67 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:42:26,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-09 04:42:26,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-11-09 04:42:26,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 04:42:26,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-11-09 04:42:26,809 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 44 [2024-11-09 04:42:26,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:42:26,809 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-11-09 04:42:26,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 04:42:26,810 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-11-09 04:42:26,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 04:42:26,811 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:42:26,811 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 04:42:26,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2024-11-09 04:42:27,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:42:27,012 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:42:27,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:42:27,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1173818606, now seen corresponding path program 1 times [2024-11-09 04:42:27,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:42:27,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293068769] [2024-11-09 04:42:27,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:42:27,014 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:42:27,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:42:27,015 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:42:27,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb78f86-62a5-467b-b394-9afb36fa5606/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-11-09 04:42:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:42:27,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 04:42:27,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:42:27,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:42:29,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2024-11-09 04:42:36,174 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:42:36,177 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:42:36,235 INFO L349 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2024-11-09 04:42:36,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 26 [2024-11-09 04:42:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:42:36,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:42:37,686 INFO L349 Elim1Store]: treesize reduction 18, result has 64.7 percent of original size [2024-11-09 04:42:37,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 251 treesize of output 215 [2024-11-09 04:42:37,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:42:37,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 211 [2024-11-09 04:42:38,400 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:42:38,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2024-11-09 04:42:39,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:42:39,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 334 treesize of output 345 [2024-11-09 04:43:23,620 WARN L286 SmtUtils]: Spent 11.59s on a formula simplification. DAG size of input: 158 DAG size of output: 152 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)