./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-pthread/cs_read_write_lock-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-pthread/cs_read_write_lock-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1458378674bd140ace04512980940eeb05aa22f50528a181d147a292aa3349d2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:58:09,826 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:58:09,898 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:58:09,903 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:58:09,904 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:58:09,929 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:58:09,930 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:58:09,931 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:58:09,931 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:58:09,932 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:58:09,932 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:58:09,933 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:58:09,934 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:58:09,934 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:58:09,935 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:58:09,935 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:58:09,936 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:58:09,936 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:58:09,937 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:58:09,937 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:58:09,938 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:58:09,939 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:58:09,939 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:58:09,940 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:58:09,940 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:58:09,941 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:58:09,941 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:58:09,942 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:58:09,942 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:58:09,943 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:58:09,943 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:58:09,944 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:58:09,944 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:58:09,944 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:58:09,945 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:58:09,945 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:58:09,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:58:09,946 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:58:09,946 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:58:09,947 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:58:09,947 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:58:09,950 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:58:09,950 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:58:09,950 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:58:09,950 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:58:09,951 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_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1458378674bd140ace04512980940eeb05aa22f50528a181d147a292aa3349d2 [2023-11-12 00:58:10,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:58:10,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:58:10,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:58:10,258 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:58:10,259 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:58:10,261 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/seq-pthread/cs_read_write_lock-2.i [2023-11-12 00:58:13,465 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:58:13,847 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:58:13,852 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/sv-benchmarks/c/seq-pthread/cs_read_write_lock-2.i [2023-11-12 00:58:13,877 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/data/f3cc8af80/7b9797293259473db68334948ff6d934/FLAG7df0f7a2a [2023-11-12 00:58:13,890 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/data/f3cc8af80/7b9797293259473db68334948ff6d934 [2023-11-12 00:58:13,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:58:13,894 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:58:13,896 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:58:13,896 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:58:13,906 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:58:13,907 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:58:13" (1/1) ... [2023-11-12 00:58:13,911 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a4a66f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:13, skipping insertion in model container [2023-11-12 00:58:13,911 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:58:13" (1/1) ... [2023-11-12 00:58:13,989 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:58:14,294 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_973c0363-7090-4d20-b19c-13f4eaed2d9d/sv-benchmarks/c/seq-pthread/cs_read_write_lock-2.i[23469,23482] [2023-11-12 00:58:14,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:58:14,491 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:58:14,526 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_973c0363-7090-4d20-b19c-13f4eaed2d9d/sv-benchmarks/c/seq-pthread/cs_read_write_lock-2.i[23469,23482] [2023-11-12 00:58:14,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:58:14,668 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:58:14,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:14 WrapperNode [2023-11-12 00:58:14,668 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:58:14,670 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:58:14,670 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:58:14,670 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:58:14,678 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:14" (1/1) ... [2023-11-12 00:58:14,728 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:14" (1/1) ... [2023-11-12 00:58:14,816 INFO L138 Inliner]: procedures = 145, calls = 279, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 557 [2023-11-12 00:58:14,823 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:58:14,824 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:58:14,824 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:58:14,824 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:58:14,835 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:14" (1/1) ... [2023-11-12 00:58:14,835 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:14" (1/1) ... [2023-11-12 00:58:14,850 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:14" (1/1) ... [2023-11-12 00:58:14,851 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:14" (1/1) ... [2023-11-12 00:58:14,918 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:14" (1/1) ... [2023-11-12 00:58:14,928 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:14" (1/1) ... [2023-11-12 00:58:14,942 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:14" (1/1) ... [2023-11-12 00:58:14,952 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:14" (1/1) ... [2023-11-12 00:58:14,960 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:58:14,961 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:58:14,962 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:58:14,962 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:58:14,963 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:14" (1/1) ... [2023-11-12 00:58:14,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:58:14,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:58:15,000 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:58:15,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:58:15,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:58:15,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:58:15,050 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:58:15,050 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:58:15,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:58:15,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:58:15,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:58:15,052 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2023-11-12 00:58:15,053 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2023-11-12 00:58:15,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:58:15,053 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2023-11-12 00:58:15,053 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2023-11-12 00:58:15,053 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2023-11-12 00:58:15,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2023-11-12 00:58:15,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:58:15,054 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2023-11-12 00:58:15,054 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2023-11-12 00:58:15,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:58:15,055 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_assume [2023-11-12 00:58:15,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_assume [2023-11-12 00:58:15,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:58:15,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:58:15,293 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:58:15,295 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:58:15,786 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-12 00:58:15,786 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##41: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);reader_#res#1.base, reader_#res#1.offset := 0, 0; [2023-11-12 00:58:18,260 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:58:18,416 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:58:18,417 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 00:58:18,419 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:58:18 BoogieIcfgContainer [2023-11-12 00:58:18,419 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:58:18,424 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:58:18,424 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:58:18,427 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:58:18,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:58:13" (1/3) ... [2023-11-12 00:58:18,428 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@734c678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:58:18, skipping insertion in model container [2023-11-12 00:58:18,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:14" (2/3) ... [2023-11-12 00:58:18,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@734c678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:58:18, skipping insertion in model container [2023-11-12 00:58:18,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:58:18" (3/3) ... [2023-11-12 00:58:18,431 INFO L112 eAbstractionObserver]: Analyzing ICFG cs_read_write_lock-2.i [2023-11-12 00:58:18,451 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:58:18,451 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:58:18,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:58:18,531 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@496e1711, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:58:18,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:58:18,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 84 states have (on average 1.369047619047619) internal successors, (115), 85 states have internal predecessors, (115), 53 states have call successors, (53), 6 states have call predecessors, (53), 6 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-11-12 00:58:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:58:18,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:58:18,572 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:58:18,572 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:58:18,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:58:18,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2048231144, now seen corresponding path program 1 times [2023-11-12 00:58:18,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:58:18,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664562111] [2023-11-12 00:58:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:18,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:58:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2023-11-12 00:58:19,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:58:19,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664562111] [2023-11-12 00:58:19,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664562111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:58:19,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:58:19,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:58:19,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870784788] [2023-11-12 00:58:19,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:58:19,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:58:19,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:58:19,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:58:19,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:58:19,970 INFO L87 Difference]: Start difference. First operand has 145 states, 84 states have (on average 1.369047619047619) internal successors, (115), 85 states have internal predecessors, (115), 53 states have call successors, (53), 6 states have call predecessors, (53), 6 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2023-11-12 00:58:22,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:58:24,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:58:24,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:58:24,358 INFO L93 Difference]: Finished difference Result 289 states and 447 transitions. [2023-11-12 00:58:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:58:24,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 69 [2023-11-12 00:58:24,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:58:24,383 INFO L225 Difference]: With dead ends: 289 [2023-11-12 00:58:24,383 INFO L226 Difference]: Without dead ends: 250 [2023-11-12 00:58:24,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:58:24,411 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 178 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:58:24,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 641 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2023-11-12 00:58:24,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-11-12 00:58:24,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2023-11-12 00:58:24,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 145 states have (on average 1.3862068965517242) internal successors, (201), 146 states have internal predecessors, (201), 91 states have call successors, (91), 12 states have call predecessors, (91), 12 states have return successors, (99), 90 states have call predecessors, (99), 91 states have call successors, (99) [2023-11-12 00:58:24,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 391 transitions. [2023-11-12 00:58:24,504 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 391 transitions. Word has length 69 [2023-11-12 00:58:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:58:24,504 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 391 transitions. [2023-11-12 00:58:24,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2023-11-12 00:58:24,505 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 391 transitions. [2023-11-12 00:58:24,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-12 00:58:24,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:58:24,523 INFO L195 NwaCegarLoop]: trace histogram [19, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:58:24,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:58:24,524 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:58:24,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:58:24,526 INFO L85 PathProgramCache]: Analyzing trace with hash 36919427, now seen corresponding path program 1 times [2023-11-12 00:58:24,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:58:24,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099750272] [2023-11-12 00:58:24,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:24,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:58:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2023-11-12 00:58:25,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:58:25,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099750272] [2023-11-12 00:58:25,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099750272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:58:25,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:58:25,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:58:25,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176173428] [2023-11-12 00:58:25,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:58:25,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:58:25,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:58:25,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:58:25,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:58:25,508 INFO L87 Difference]: Start difference. First operand 249 states and 391 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (22), 1 states have call predecessors, (22), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:58:27,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:58:29,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:58:30,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:58:30,004 INFO L93 Difference]: Finished difference Result 458 states and 723 transitions. [2023-11-12 00:58:30,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:58:30,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (22), 1 states have call predecessors, (22), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) Word has length 122 [2023-11-12 00:58:30,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:58:30,025 INFO L225 Difference]: With dead ends: 458 [2023-11-12 00:58:30,025 INFO L226 Difference]: Without dead ends: 419 [2023-11-12 00:58:30,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:58:30,037 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 184 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 24 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:58:30,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 490 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 110 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-11-12 00:58:30,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-11-12 00:58:30,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 409. [2023-11-12 00:58:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 239 states have (on average 1.3765690376569037) internal successors, (329), 244 states have internal predecessors, (329), 146 states have call successors, (146), 20 states have call predecessors, (146), 23 states have return successors, (177), 144 states have call predecessors, (177), 146 states have call successors, (177) [2023-11-12 00:58:30,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 652 transitions. [2023-11-12 00:58:30,183 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 652 transitions. Word has length 122 [2023-11-12 00:58:30,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:58:30,183 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 652 transitions. [2023-11-12 00:58:30,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (22), 1 states have call predecessors, (22), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:58:30,183 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 652 transitions. [2023-11-12 00:58:30,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-12 00:58:30,193 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:58:30,194 INFO L195 NwaCegarLoop]: trace histogram [19, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:58:30,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:58:30,195 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:58:30,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:58:30,205 INFO L85 PathProgramCache]: Analyzing trace with hash 2105281718, now seen corresponding path program 1 times [2023-11-12 00:58:30,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:58:30,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768046765] [2023-11-12 00:58:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:30,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:58:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2023-11-12 00:58:30,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:58:31,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768046765] [2023-11-12 00:58:31,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768046765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:58:31,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:58:31,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:58:31,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868510194] [2023-11-12 00:58:31,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:58:31,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:58:31,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:58:31,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:58:31,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:58:31,012 INFO L87 Difference]: Start difference. First operand 409 states and 652 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (22), 1 states have call predecessors, (22), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:58:33,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:58:35,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:58:35,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:58:35,516 INFO L93 Difference]: Finished difference Result 564 states and 885 transitions. [2023-11-12 00:58:35,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:58:35,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (22), 1 states have call predecessors, (22), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) Word has length 122 [2023-11-12 00:58:35,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:58:35,526 INFO L225 Difference]: With dead ends: 564 [2023-11-12 00:58:35,526 INFO L226 Difference]: Without dead ends: 425 [2023-11-12 00:58:35,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:58:35,531 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 158 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:58:35,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 526 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 128 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-11-12 00:58:35,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-11-12 00:58:35,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 413. [2023-11-12 00:58:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 241 states have (on average 1.3734439834024896) internal successors, (331), 248 states have internal predecessors, (331), 146 states have call successors, (146), 20 states have call predecessors, (146), 25 states have return successors, (186), 144 states have call predecessors, (186), 146 states have call successors, (186) [2023-11-12 00:58:35,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 663 transitions. [2023-11-12 00:58:35,599 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 663 transitions. Word has length 122 [2023-11-12 00:58:35,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:58:35,600 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 663 transitions. [2023-11-12 00:58:35,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (22), 1 states have call predecessors, (22), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:58:35,600 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 663 transitions. [2023-11-12 00:58:35,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-12 00:58:35,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:58:35,607 INFO L195 NwaCegarLoop]: trace histogram [19, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:58:35,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:58:35,608 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:58:35,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:58:35,608 INFO L85 PathProgramCache]: Analyzing trace with hash 338862315, now seen corresponding path program 1 times [2023-11-12 00:58:35,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:58:35,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022752133] [2023-11-12 00:58:35,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:35,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:58:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2023-11-12 00:58:36,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:58:36,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022752133] [2023-11-12 00:58:36,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022752133] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:58:36,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:58:36,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:58:36,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864796227] [2023-11-12 00:58:36,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:58:36,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:58:36,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:58:36,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:58:36,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:58:36,420 INFO L87 Difference]: Start difference. First operand 413 states and 663 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (22), 1 states have call predecessors, (22), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:58:38,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:58:40,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:58:40,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:58:40,876 INFO L93 Difference]: Finished difference Result 803 states and 1265 transitions. [2023-11-12 00:58:40,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:58:40,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (22), 1 states have call predecessors, (22), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) Word has length 122 [2023-11-12 00:58:40,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:58:40,882 INFO L225 Difference]: With dead ends: 803 [2023-11-12 00:58:40,882 INFO L226 Difference]: Without dead ends: 425 [2023-11-12 00:58:40,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:58:40,889 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 188 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:58:40,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 496 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 114 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-11-12 00:58:40,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-11-12 00:58:40,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 415. [2023-11-12 00:58:40,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 242 states have (on average 1.371900826446281) internal successors, (332), 250 states have internal predecessors, (332), 146 states have call successors, (146), 20 states have call predecessors, (146), 26 states have return successors, (182), 144 states have call predecessors, (182), 146 states have call successors, (182) [2023-11-12 00:58:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 660 transitions. [2023-11-12 00:58:40,963 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 660 transitions. Word has length 122 [2023-11-12 00:58:40,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:58:40,964 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 660 transitions. [2023-11-12 00:58:40,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (22), 1 states have call predecessors, (22), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:58:40,964 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 660 transitions. [2023-11-12 00:58:40,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-12 00:58:40,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:58:40,971 INFO L195 NwaCegarLoop]: trace histogram [19, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:58:40,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:58:40,971 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:58:40,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:58:40,972 INFO L85 PathProgramCache]: Analyzing trace with hash -985888801, now seen corresponding path program 1 times [2023-11-12 00:58:40,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:58:40,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863341469] [2023-11-12 00:58:40,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:40,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:58:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2023-11-12 00:58:41,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:58:41,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863341469] [2023-11-12 00:58:41,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863341469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:58:41,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:58:41,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:58:41,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585606391] [2023-11-12 00:58:41,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:58:41,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:58:41,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:58:41,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:58:41,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:58:41,738 INFO L87 Difference]: Start difference. First operand 415 states and 660 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (22), 1 states have call predecessors, (22), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:58:43,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:58:45,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:58:46,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:58:46,175 INFO L93 Difference]: Finished difference Result 821 states and 1288 transitions. [2023-11-12 00:58:46,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:58:46,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (22), 1 states have call predecessors, (22), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) Word has length 122 [2023-11-12 00:58:46,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:58:46,181 INFO L225 Difference]: With dead ends: 821 [2023-11-12 00:58:46,182 INFO L226 Difference]: Without dead ends: 405 [2023-11-12 00:58:46,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:58:46,186 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 190 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 22 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:58:46,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 496 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 113 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-11-12 00:58:46,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-11-12 00:58:46,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 395. [2023-11-12 00:58:46,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 232 states have (on average 1.3491379310344827) internal successors, (313), 239 states have internal predecessors, (313), 136 states have call successors, (136), 20 states have call predecessors, (136), 26 states have return successors, (165), 135 states have call predecessors, (165), 136 states have call successors, (165) [2023-11-12 00:58:46,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 614 transitions. [2023-11-12 00:58:46,238 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 614 transitions. Word has length 122 [2023-11-12 00:58:46,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:58:46,240 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 614 transitions. [2023-11-12 00:58:46,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (22), 1 states have call predecessors, (22), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:58:46,241 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 614 transitions. [2023-11-12 00:58:46,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-12 00:58:46,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:58:46,252 INFO L195 NwaCegarLoop]: trace histogram [19, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:58:46,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:58:46,252 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:58:46,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:58:46,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1563773822, now seen corresponding path program 1 times [2023-11-12 00:58:46,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:58:46,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723086402] [2023-11-12 00:58:46,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:46,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:58:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2023-11-12 00:58:46,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:58:46,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723086402] [2023-11-12 00:58:46,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723086402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:58:46,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:58:46,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:58:46,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988543010] [2023-11-12 00:58:46,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:58:46,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:58:46,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:58:46,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:58:46,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:58:46,994 INFO L87 Difference]: Start difference. First operand 395 states and 614 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (22), 1 states have call predecessors, (22), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:58:49,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:58:51,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:58:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:58:51,382 INFO L93 Difference]: Finished difference Result 695 states and 1072 transitions. [2023-11-12 00:58:51,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:58:51,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (22), 1 states have call predecessors, (22), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) Word has length 122 [2023-11-12 00:58:51,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:58:51,387 INFO L225 Difference]: With dead ends: 695 [2023-11-12 00:58:51,387 INFO L226 Difference]: Without dead ends: 300 [2023-11-12 00:58:51,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:58:51,391 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 110 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:58:51,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 504 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 135 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2023-11-12 00:58:51,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2023-11-12 00:58:51,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 296. [2023-11-12 00:58:51,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 174 states have (on average 1.3620689655172413) internal successors, (237), 179 states have internal predecessors, (237), 101 states have call successors, (101), 16 states have call predecessors, (101), 20 states have return successors, (127), 100 states have call predecessors, (127), 101 states have call successors, (127) [2023-11-12 00:58:51,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 465 transitions. [2023-11-12 00:58:51,424 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 465 transitions. Word has length 122 [2023-11-12 00:58:51,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:58:51,425 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 465 transitions. [2023-11-12 00:58:51,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (22), 1 states have call predecessors, (22), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:58:51,425 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 465 transitions. [2023-11-12 00:58:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-12 00:58:51,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:58:51,431 INFO L195 NwaCegarLoop]: trace histogram [22, 8, 8, 8, 8, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:58:51,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:58:51,431 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:58:51,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:58:51,432 INFO L85 PathProgramCache]: Analyzing trace with hash -855008107, now seen corresponding path program 1 times [2023-11-12 00:58:51,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:58:51,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115841977] [2023-11-12 00:58:51,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:51,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:58:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2023-11-12 00:58:52,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:58:52,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115841977] [2023-11-12 00:58:52,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115841977] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:58:52,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782489763] [2023-11-12 00:58:52,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:52,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:58:52,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:58:52,452 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:58:52,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:58:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:53,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:58:53,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:58:53,400 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 5 [2023-11-12 00:58:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2023-11-12 00:58:53,500 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:58:53,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782489763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:58:53,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:58:53,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-11-12 00:58:53,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145698715] [2023-11-12 00:58:53,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:58:53,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:58:53,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:58:53,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:58:53,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:58:53,504 INFO L87 Difference]: Start difference. First operand 296 states and 465 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (32), 3 states have call predecessors, (32), 4 states have call successors, (32) [2023-11-12 00:58:55,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:58:57,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:58:57,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:58:57,815 INFO L93 Difference]: Finished difference Result 528 states and 824 transitions. [2023-11-12 00:58:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:58:57,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (32), 3 states have call predecessors, (32), 4 states have call successors, (32) Word has length 173 [2023-11-12 00:58:57,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:58:57,819 INFO L225 Difference]: With dead ends: 528 [2023-11-12 00:58:57,819 INFO L226 Difference]: Without dead ends: 269 [2023-11-12 00:58:57,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:58:57,821 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 90 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:58:57,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 499 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2023-11-12 00:58:57,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-11-12 00:58:57,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 265. [2023-11-12 00:58:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 154 states have (on average 1.3571428571428572) internal successors, (209), 157 states have internal predecessors, (209), 93 states have call successors, (93), 15 states have call predecessors, (93), 17 states have return successors, (116), 92 states have call predecessors, (116), 93 states have call successors, (116) [2023-11-12 00:58:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 418 transitions. [2023-11-12 00:58:57,850 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 418 transitions. Word has length 173 [2023-11-12 00:58:57,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:58:57,850 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 418 transitions. [2023-11-12 00:58:57,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (32), 3 states have call predecessors, (32), 4 states have call successors, (32) [2023-11-12 00:58:57,851 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 418 transitions. [2023-11-12 00:58:57,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-12 00:58:57,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:58:57,856 INFO L195 NwaCegarLoop]: trace histogram [22, 8, 8, 8, 8, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:58:57,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:58:58,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:58:58,071 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:58:58,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:58:58,072 INFO L85 PathProgramCache]: Analyzing trace with hash -488775799, now seen corresponding path program 1 times [2023-11-12 00:58:58,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:58:58,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323574152] [2023-11-12 00:58:58,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:58,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:58:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2023-11-12 00:59:00,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:00,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323574152] [2023-11-12 00:59:00,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323574152] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:00,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154272539] [2023-11-12 00:59:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:00,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:00,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:00,930 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:00,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973c0363-7090-4d20-b19c-13f4eaed2d9d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:59:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:01,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-12 00:59:01,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:01,947 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 5 [2023-11-12 00:59:01,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 5 [2023-11-12 00:59:02,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:02,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:02,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:02,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:02,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:02,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:02,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:02,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:02,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:02,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:02,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:02,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:02,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:02,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:02,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:02,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:02,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:02,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:02,634 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-12 00:59:02,642 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-12 00:59:02,880 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-12 00:59:02,889 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-12 00:59:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 230 proven. 55 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2023-11-12 00:59:03,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:03,462 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2023-11-12 00:59:03,466 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12