./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount10_file-23.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount10_file-23.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire --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 d07b7415c3fe9e96ce75813c6dc74e1ba61589ee27a287636eeb985665ada946 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:10:24,508 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:10:24,620 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:10:24,627 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:10:24,628 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:10:24,668 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:10:24,669 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:10:24,670 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:10:24,671 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:10:24,672 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:10:24,672 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:10:24,673 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:10:24,674 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:10:24,675 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:10:24,675 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:10:24,676 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:10:24,677 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:10:24,678 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:10:24,679 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:10:24,680 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:10:24,680 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:10:24,681 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:10:24,683 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:10:24,684 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:10:24,684 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:10:24,685 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:10:24,686 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:10:24,687 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:10:24,687 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:10:24,688 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:10:24,689 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:10:24,689 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:10:24,690 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:10:24,690 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:10:24,691 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:10:24,692 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:10:24,693 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:10:24,693 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:10:24,694 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:10:24,694 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:10:24,695 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:10:24,696 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:10:24,696 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:10:24,697 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:10:24,697 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:10:24,698 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:10:24,698 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:10:24,699 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_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d07b7415c3fe9e96ce75813c6dc74e1ba61589ee27a287636eeb985665ada946 [2023-11-23 21:10:25,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:10:25,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:10:25,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:10:25,072 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:10:25,073 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:10:25,074 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount10_file-23.i [2023-11-23 21:10:28,968 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:10:29,336 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:10:29,340 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount10_file-23.i [2023-11-23 21:10:29,353 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/data/67216083c/3c2e0eb40569431791ddae069e85d578/FLAGbd39b6088 [2023-11-23 21:10:29,375 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/data/67216083c/3c2e0eb40569431791ddae069e85d578 [2023-11-23 21:10:29,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:10:29,388 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:10:29,392 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:10:29,393 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:10:29,400 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:10:29,402 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:10:29" (1/1) ... [2023-11-23 21:10:29,403 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32f1d63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:29, skipping insertion in model container [2023-11-23 21:10:29,403 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:10:29" (1/1) ... [2023-11-23 21:10:29,450 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:10:29,702 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount10_file-23.i[915,928] [2023-11-23 21:10:29,742 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:10:29,757 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:10:29,775 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount10_file-23.i[915,928] [2023-11-23 21:10:29,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:10:29,818 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:10:29,818 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:29 WrapperNode [2023-11-23 21:10:29,819 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:10:29,821 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:10:29,821 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:10:29,821 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:10:29,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:29" (1/1) ... [2023-11-23 21:10:29,841 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:29" (1/1) ... [2023-11-23 21:10:29,882 INFO L138 Inliner]: procedures = 26, calls = 27, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 144 [2023-11-23 21:10:29,882 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:10:29,883 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:10:29,884 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:10:29,884 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:10:29,897 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:29" (1/1) ... [2023-11-23 21:10:29,898 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:29" (1/1) ... [2023-11-23 21:10:29,901 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:29" (1/1) ... [2023-11-23 21:10:29,902 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:29" (1/1) ... [2023-11-23 21:10:29,909 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:29" (1/1) ... [2023-11-23 21:10:29,915 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:29" (1/1) ... [2023-11-23 21:10:29,918 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:29" (1/1) ... [2023-11-23 21:10:29,920 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:29" (1/1) ... [2023-11-23 21:10:29,924 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:10:29,925 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:10:29,926 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:10:29,926 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:10:29,927 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:29" (1/1) ... [2023-11-23 21:10:29,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:10:29,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:10:29,992 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:10:30,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:10:30,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:10:30,043 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:10:30,043 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:10:30,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:10:30,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:10:30,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:10:30,138 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:10:30,142 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:10:30,546 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:10:30,861 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:10:30,862 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:10:30,864 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:10:30 BoogieIcfgContainer [2023-11-23 21:10:30,864 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:10:30,868 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:10:30,868 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:10:30,873 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:10:30,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:10:29" (1/3) ... [2023-11-23 21:10:30,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:10:30, skipping insertion in model container [2023-11-23 21:10:30,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:29" (2/3) ... [2023-11-23 21:10:30,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:10:30, skipping insertion in model container [2023-11-23 21:10:30,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:10:30" (3/3) ... [2023-11-23 21:10:30,877 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount10_file-23.i [2023-11-23 21:10:30,904 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:10:30,904 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:10:30,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:10:30,980 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5d3aa843, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:10:30,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:10:30,985 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-23 21:10:30,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 21:10:30,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:31,000 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:10:31,001 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:31,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:31,008 INFO L85 PathProgramCache]: Analyzing trace with hash -712236076, now seen corresponding path program 1 times [2023-11-23 21:10:31,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:31,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263531859] [2023-11-23 21:10:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:31,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2023-11-23 21:10:33,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:33,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263531859] [2023-11-23 21:10:33,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263531859] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:10:33,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720817003] [2023-11-23 21:10:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:33,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:10:33,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:10:33,481 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:10:33,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:10:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:33,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 21:10:33,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:10:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 124 proven. 4 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-23 21:10:40,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:10:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2023-11-23 21:10:46,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720817003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:10:46,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [788993528] [2023-11-23 21:10:46,796 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-23 21:10:46,796 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:10:46,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:10:46,812 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:10:46,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:10:50,111 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 80 for LOIs [2023-11-23 21:10:50,137 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:10:53,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [788993528] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:53,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:10:53,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [6, 6, 5] total 26 [2023-11-23 21:10:53,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556693663] [2023-11-23 21:10:53,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:53,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 21:10:53,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:53,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 21:10:53,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2023-11-23 21:10:53,317 INFO L87 Difference]: Start difference. First operand has 30 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 16 states, 12 states have (on average 1.0) internal successors, (12), 11 states have internal predecessors, (12), 8 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-23 21:10:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:55,851 INFO L93 Difference]: Finished difference Result 98 states and 135 transitions. [2023-11-23 21:10:55,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-23 21:10:55,857 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 1.0) internal successors, (12), 11 states have internal predecessors, (12), 8 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) Word has length 53 [2023-11-23 21:10:55,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:55,866 INFO L225 Difference]: With dead ends: 98 [2023-11-23 21:10:55,866 INFO L226 Difference]: Without dead ends: 69 [2023-11-23 21:10:55,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2023-11-23 21:10:55,876 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:55,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 97 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:10:55,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-23 21:10:55,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2023-11-23 21:10:55,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 28 states have call successors, (28), 9 states have call predecessors, (28), 9 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-23 21:10:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2023-11-23 21:10:55,938 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 53 [2023-11-23 21:10:55,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:55,939 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2023-11-23 21:10:55,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 1.0) internal successors, (12), 11 states have internal predecessors, (12), 8 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-23 21:10:55,939 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2023-11-23 21:10:55,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-23 21:10:55,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:55,945 INFO L195 NwaCegarLoop]: trace histogram [28, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-23 21:10:55,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:10:56,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 21:10:56,166 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:56,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:56,167 INFO L85 PathProgramCache]: Analyzing trace with hash -86964749, now seen corresponding path program 1 times [2023-11-23 21:10:56,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:56,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594084613] [2023-11-23 21:10:56,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:56,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 56 proven. 1 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2023-11-23 21:10:57,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:57,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594084613] [2023-11-23 21:10:57,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594084613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:10:57,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130572938] [2023-11-23 21:10:57,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:57,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:10:57,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:10:57,406 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:10:57,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61474fe-89b0-4385-ab5b-8f1c937d85f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:10:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:57,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 21:10:57,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:10:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 139 proven. 18 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2023-11-23 21:10:59,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:11:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 747 trivial. 0 not checked. [2023-11-23 21:11:04,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130572938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:11:04,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [318658969] [2023-11-23 21:11:04,318 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-11-23 21:11:04,318 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:11:04,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:11:04,319 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:11:04,319 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs