./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy9_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy9_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --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 aab03c22d13215fab0d6755eff6eea090232335ae63c67c9d83313131cbb4c89 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:31:59,525 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:31:59,609 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-06 20:31:59,615 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:31:59,616 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:31:59,644 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:31:59,645 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:31:59,646 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:31:59,647 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:31:59,647 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:31:59,648 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:31:59,648 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:31:59,649 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:31:59,649 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:31:59,650 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:31:59,650 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:31:59,651 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:31:59,651 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:31:59,652 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:31:59,652 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:31:59,653 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:31:59,654 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:31:59,655 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:31:59,655 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 20:31:59,655 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:31:59,656 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:31:59,656 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:31:59,657 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:31:59,657 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 20:31:59,658 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:31:59,658 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 20:31:59,658 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:31:59,659 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 20:31:59,659 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:31:59,659 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:31:59,660 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:31:59,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:31:59,660 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:31:59,660 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:31:59,661 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 20:31:59,661 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:31:59,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:31:59,662 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 20:31:59,662 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:31:59,662 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:31:59,662 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_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aab03c22d13215fab0d6755eff6eea090232335ae63c67c9d83313131cbb4c89 [2023-11-06 20:31:59,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:31:59,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:31:59,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:31:59,963 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:31:59,963 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:31:59,966 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/array-examples/standard_copy9_ground-2.i [2023-11-06 20:32:03,025 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:32:03,321 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:32:03,322 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/sv-benchmarks/c/array-examples/standard_copy9_ground-2.i [2023-11-06 20:32:03,332 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/data/30602a6c1/80f6e5317a0d466c88a80a5990a0e29b/FLAG4fbb599c3 [2023-11-06 20:32:03,666 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/data/30602a6c1/80f6e5317a0d466c88a80a5990a0e29b [2023-11-06 20:32:03,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:32:03,676 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:32:03,680 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:32:03,681 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:32:03,686 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:32:03,687 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:32:03" (1/1) ... [2023-11-06 20:32:03,688 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61a54867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:03, skipping insertion in model container [2023-11-06 20:32:03,688 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:32:03" (1/1) ... [2023-11-06 20:32:03,712 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:32:03,888 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_2b257927-9db5-4c38-95c4-9677d8f469d9/sv-benchmarks/c/array-examples/standard_copy9_ground-2.i[816,829] [2023-11-06 20:32:03,913 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:32:03,923 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:32:03,936 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_2b257927-9db5-4c38-95c4-9677d8f469d9/sv-benchmarks/c/array-examples/standard_copy9_ground-2.i[816,829] [2023-11-06 20:32:03,953 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:32:03,969 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:32:03,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:03 WrapperNode [2023-11-06 20:32:03,969 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:32:03,971 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:32:03,971 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:32:03,971 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:32:03,979 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:03" (1/1) ... [2023-11-06 20:32:03,988 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:03" (1/1) ... [2023-11-06 20:32:04,018 INFO L138 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 192 [2023-11-06 20:32:04,018 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:32:04,019 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:32:04,019 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:32:04,019 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:32:04,031 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:03" (1/1) ... [2023-11-06 20:32:04,032 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:03" (1/1) ... [2023-11-06 20:32:04,046 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:03" (1/1) ... [2023-11-06 20:32:04,047 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:03" (1/1) ... [2023-11-06 20:32:04,057 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:03" (1/1) ... [2023-11-06 20:32:04,065 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:03" (1/1) ... [2023-11-06 20:32:04,074 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:03" (1/1) ... [2023-11-06 20:32:04,076 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:03" (1/1) ... [2023-11-06 20:32:04,079 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:32:04,080 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:32:04,080 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:32:04,080 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:32:04,081 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:03" (1/1) ... [2023-11-06 20:32:04,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:32:04,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:32:04,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:32:04,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:32:04,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:32:04,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:32:04,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 20:32:04,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:32:04,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:32:04,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:32:04,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:32:04,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:32:04,246 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:32:04,249 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:32:04,554 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:32:04,647 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:32:04,647 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-06 20:32:04,650 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:32:04 BoogieIcfgContainer [2023-11-06 20:32:04,650 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:32:04,653 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:32:04,653 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:32:04,657 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:32:04,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:32:03" (1/3) ... [2023-11-06 20:32:04,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1b6bfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:32:04, skipping insertion in model container [2023-11-06 20:32:04,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:03" (2/3) ... [2023-11-06 20:32:04,659 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1b6bfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:32:04, skipping insertion in model container [2023-11-06 20:32:04,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:32:04" (3/3) ... [2023-11-06 20:32:04,661 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-2.i [2023-11-06 20:32:04,683 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:32:04,683 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 20:32:04,741 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:32:04,749 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=LoopsAndPotentialCycles, 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;@65b878b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:32:04,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 20:32:04,753 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:04,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 20:32:04,760 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:04,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:32:04,762 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:04,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:04,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1813374179, now seen corresponding path program 1 times [2023-11-06 20:32:04,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:04,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000793308] [2023-11-06 20:32:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:04,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:32:05,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:05,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000793308] [2023-11-06 20:32:05,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000793308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:32:05,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:32:05,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:32:05,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55001532] [2023-11-06 20:32:05,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:32:05,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:32:05,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:05,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:32:05,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:32:05,299 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:05,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:05,412 INFO L93 Difference]: Finished difference Result 33 states and 55 transitions. [2023-11-06 20:32:05,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:32:05,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-06 20:32:05,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:05,424 INFO L225 Difference]: With dead ends: 33 [2023-11-06 20:32:05,424 INFO L226 Difference]: Without dead ends: 17 [2023-11-06 20:32:05,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:32:05,432 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:05,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:32:05,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-06 20:32:05,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-06 20:32:05,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2023-11-06 20:32:05,471 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 14 [2023-11-06 20:32:05,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:05,472 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2023-11-06 20:32:05,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:05,473 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2023-11-06 20:32:05,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 20:32:05,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:05,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:32:05,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:32:05,475 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:05,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:05,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1669124400, now seen corresponding path program 1 times [2023-11-06 20:32:05,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:05,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58879547] [2023-11-06 20:32:05,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:05,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:32:05,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:05,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58879547] [2023-11-06 20:32:05,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58879547] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:32:05,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602610402] [2023-11-06 20:32:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:05,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:05,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:32:05,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:32:05,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:32:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:05,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 20:32:05,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:32:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:32:05,902 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:32:05,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602610402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:32:05,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 20:32:05,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 20:32:05,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664503569] [2023-11-06 20:32:05,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:32:05,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:32:05,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:05,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:32:05,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:32:05,914 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:06,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:06,019 INFO L93 Difference]: Finished difference Result 39 states and 66 transitions. [2023-11-06 20:32:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:32:06,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-06 20:32:06,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:06,022 INFO L225 Difference]: With dead ends: 39 [2023-11-06 20:32:06,022 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 20:32:06,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:32:06,025 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:06,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:32:06,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 20:32:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-06 20:32:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2023-11-06 20:32:06,042 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 15 [2023-11-06 20:32:06,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:06,042 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2023-11-06 20:32:06,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:06,043 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2023-11-06 20:32:06,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 20:32:06,044 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:06,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:32:06,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 20:32:06,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:06,251 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:06,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:06,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2035806513, now seen corresponding path program 1 times [2023-11-06 20:32:06,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:06,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391341157] [2023-11-06 20:32:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:06,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 20:32:06,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:06,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391341157] [2023-11-06 20:32:06,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391341157] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:32:06,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364906446] [2023-11-06 20:32:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:06,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:06,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:32:06,463 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:32:06,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 20:32:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:06,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 20:32:06,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:32:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 20:32:06,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:32:06,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 20:32:06,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364906446] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:32:06,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1603121445] [2023-11-06 20:32:06,721 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-06 20:32:06,722 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:32:06,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:32:06,734 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:32:06,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:32:09,789 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:32:10,725 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '415#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (not (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|)) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem22#1|) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) 0) |ULTIMATE.start_main_#t~mem23#1|) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 2 |ULTIMATE.start_main_~#a0~0#1.base|))' at error location [2023-11-06 20:32:10,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:32:10,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:32:10,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 20:32:10,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661553004] [2023-11-06 20:32:10,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:32:10,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:32:10,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:10,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:32:10,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 20:32:10,732 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:10,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:10,868 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2023-11-06 20:32:10,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:32:10,869 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-06 20:32:10,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:10,870 INFO L225 Difference]: With dead ends: 52 [2023-11-06 20:32:10,870 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 20:32:10,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 20:32:10,877 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:10,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:32:10,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 20:32:10,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-06 20:32:10,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:10,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2023-11-06 20:32:10,894 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2023-11-06 20:32:10,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:10,895 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2023-11-06 20:32:10,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:10,895 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2023-11-06 20:32:10,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 20:32:10,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:10,897 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:32:10,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 20:32:11,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:11,104 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:11,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:11,105 INFO L85 PathProgramCache]: Analyzing trace with hash 61706972, now seen corresponding path program 2 times [2023-11-06 20:32:11,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:11,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606925916] [2023-11-06 20:32:11,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:11,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:11,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 20:32:11,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:11,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606925916] [2023-11-06 20:32:11,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606925916] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:32:11,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95761872] [2023-11-06 20:32:11,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 20:32:11,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:11,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:32:11,282 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:32:11,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 20:32:11,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 20:32:11,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:32:11,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 20:32:11,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:32:11,447 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 20:32:11,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:32:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 20:32:11,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95761872] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:32:11,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [206166710] [2023-11-06 20:32:11,472 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-06 20:32:11,472 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:32:11,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:32:11,473 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:32:11,473 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:32:13,444 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:32:14,411 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '731#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (not (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|)) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem22#1|) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) 0) |ULTIMATE.start_main_#t~mem23#1|) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 2 |ULTIMATE.start_main_~#a0~0#1.base|))' at error location [2023-11-06 20:32:14,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:32:14,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:32:14,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-06 20:32:14,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334913244] [2023-11-06 20:32:14,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:32:14,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:32:14,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:14,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:32:14,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 20:32:14,414 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:14,618 INFO L93 Difference]: Finished difference Result 77 states and 122 transitions. [2023-11-06 20:32:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:32:14,619 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-06 20:32:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:14,620 INFO L225 Difference]: With dead ends: 77 [2023-11-06 20:32:14,620 INFO L226 Difference]: Without dead ends: 56 [2023-11-06 20:32:14,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 20:32:14,621 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:14,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:32:14,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-06 20:32:14,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-06 20:32:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2023-11-06 20:32:14,632 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 27 [2023-11-06 20:32:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:14,632 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2023-11-06 20:32:14,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:14,633 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2023-11-06 20:32:14,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 20:32:14,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:14,635 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:32:14,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 20:32:14,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:14,842 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:14,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:14,843 INFO L85 PathProgramCache]: Analyzing trace with hash -320642205, now seen corresponding path program 3 times [2023-11-06 20:32:14,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:14,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866687624] [2023-11-06 20:32:14,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:14,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-06 20:32:15,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:15,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866687624] [2023-11-06 20:32:15,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866687624] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:32:15,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240460047] [2023-11-06 20:32:15,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 20:32:15,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:15,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:32:15,209 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:32:15,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 20:32:15,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 20:32:15,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:32:15,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 20:32:15,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:32:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-06 20:32:15,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:32:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-06 20:32:15,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240460047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:32:15,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1899180074] [2023-11-06 20:32:15,511 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-06 20:32:15,512 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:32:15,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:32:15,512 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:32:15,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:32:17,126 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:32:18,185 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1319#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (not (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|)) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem22#1|) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) 0) |ULTIMATE.start_main_#t~mem23#1|) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 2 |ULTIMATE.start_main_~#a0~0#1.base|))' at error location [2023-11-06 20:32:18,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:32:18,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:32:18,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 20:32:18,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393206205] [2023-11-06 20:32:18,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:32:18,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 20:32:18,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:18,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 20:32:18,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-11-06 20:32:18,189 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:18,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:18,289 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2023-11-06 20:32:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 20:32:18,289 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-06 20:32:18,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:18,290 INFO L225 Difference]: With dead ends: 112 [2023-11-06 20:32:18,290 INFO L226 Difference]: Without dead ends: 62 [2023-11-06 20:32:18,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 130 SyntacticMatches, 20 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-11-06 20:32:18,292 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:18,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:32:18,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-06 20:32:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-06 20:32:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2023-11-06 20:32:18,302 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 54 [2023-11-06 20:32:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:18,303 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2023-11-06 20:32:18,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2023-11-06 20:32:18,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-06 20:32:18,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:18,305 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:32:18,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 20:32:18,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:18,513 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:18,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:18,514 INFO L85 PathProgramCache]: Analyzing trace with hash 496239683, now seen corresponding path program 4 times [2023-11-06 20:32:18,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:18,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033797735] [2023-11-06 20:32:18,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:18,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-06 20:32:18,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:18,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033797735] [2023-11-06 20:32:18,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033797735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:32:18,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356258431] [2023-11-06 20:32:18,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 20:32:18,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:18,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:32:18,938 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:32:18,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 20:32:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:19,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 20:32:19,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:32:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-06 20:32:19,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:32:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-06 20:32:19,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356258431] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:32:19,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1351364887] [2023-11-06 20:32:19,458 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-06 20:32:19,458 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:32:19,458 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:32:19,459 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:32:19,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:32:20,918 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:32:22,398 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2037#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (not (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|)) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem22#1|) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) 0) |ULTIMATE.start_main_#t~mem23#1|) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 2 |ULTIMATE.start_main_~#a0~0#1.base|))' at error location [2023-11-06 20:32:22,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:32:22,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:32:22,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-06 20:32:22,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757317156] [2023-11-06 20:32:22,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:32:22,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 20:32:22,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:22,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 20:32:22,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2023-11-06 20:32:22,402 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:22,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:22,539 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2023-11-06 20:32:22,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 20:32:22,540 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-11-06 20:32:22,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:22,541 INFO L225 Difference]: With dead ends: 124 [2023-11-06 20:32:22,541 INFO L226 Difference]: Without dead ends: 74 [2023-11-06 20:32:22,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 137 SyntacticMatches, 25 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2023-11-06 20:32:22,543 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:22,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:32:22,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-06 20:32:22,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-06 20:32:22,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 73 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2023-11-06 20:32:22,556 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 60 [2023-11-06 20:32:22,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:22,557 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2023-11-06 20:32:22,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:22,557 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2023-11-06 20:32:22,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-06 20:32:22,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:22,559 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:32:22,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 20:32:22,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:22,768 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:22,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:22,768 INFO L85 PathProgramCache]: Analyzing trace with hash 2015809027, now seen corresponding path program 5 times [2023-11-06 20:32:22,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:22,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356391262] [2023-11-06 20:32:22,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:22,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-06 20:32:23,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:23,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356391262] [2023-11-06 20:32:23,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356391262] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:32:23,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232852601] [2023-11-06 20:32:23,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 20:32:23,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:23,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:32:23,823 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:32:23,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 20:32:24,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 20:32:24,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:32:24,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 20:32:24,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:32:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2023-11-06 20:32:24,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:32:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2023-11-06 20:32:24,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232852601] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:32:24,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [979001647] [2023-11-06 20:32:24,661 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-06 20:32:24,661 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:32:24,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:32:24,662 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:32:24,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:32:25,819 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:32:28,662 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2885#(and (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (not (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|)) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem22#1|) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) 0) |ULTIMATE.start_main_#t~mem23#1|) (<= 2 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 2 |ULTIMATE.start_main_~#a0~0#1.base|))' at error location [2023-11-06 20:32:28,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:32:28,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:32:28,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2023-11-06 20:32:28,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558644678] [2023-11-06 20:32:28,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:32:28,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 20:32:28,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:28,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 20:32:28,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 20:32:28,667 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:29,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:29,132 INFO L93 Difference]: Finished difference Result 179 states and 253 transitions. [2023-11-06 20:32:29,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 20:32:29,132 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-11-06 20:32:29,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:29,134 INFO L225 Difference]: With dead ends: 179 [2023-11-06 20:32:29,134 INFO L226 Difference]: Without dead ends: 129 [2023-11-06 20:32:29,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 165 SyntacticMatches, 35 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 20:32:29,136 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:29,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 20:32:29,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-06 20:32:29,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-11-06 20:32:29,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0859375) internal successors, (139), 128 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:29,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2023-11-06 20:32:29,153 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 72 [2023-11-06 20:32:29,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:29,153 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2023-11-06 20:32:29,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:29,154 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2023-11-06 20:32:29,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-06 20:32:29,158 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:29,158 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:32:29,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 20:32:29,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:29,366 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:29,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:29,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1091535152, now seen corresponding path program 6 times [2023-11-06 20:32:29,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:29,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135712770] [2023-11-06 20:32:29,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:29,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-11-06 20:32:30,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:30,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135712770] [2023-11-06 20:32:30,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135712770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:32:30,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4956889] [2023-11-06 20:32:30,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 20:32:30,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:30,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:32:30,838 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:32:30,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b257927-9db5-4c38-95c4-9677d8f469d9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 20:32:31,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 20:32:31,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:32:31,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 20:32:31,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:32:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-11-06 20:32:31,271 INFO L327 TraceCheckSpWp]: Computing backward predicates...