./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/s3_srvr_3a_alt.BV.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_srvr_3a_alt.BV.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh --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 c802d0dd4f8edaf03f1251784a424c8f295192f6a4e7c65ec93469eacce08251 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:32:17,454 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:32:17,522 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:32:17,526 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:32:17,527 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:32:17,553 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:32:17,553 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:32:17,554 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:32:17,555 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:32:17,555 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:32:17,556 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:32:17,556 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:32:17,557 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:32:17,557 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:32:17,558 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:32:17,558 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:32:17,559 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:32:17,559 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:32:17,560 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:32:17,560 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:32:17,561 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:32:17,562 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:32:17,563 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:32:17,563 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:32:17,564 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:32:17,564 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:32:17,565 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:32:17,565 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:32:17,566 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:32:17,566 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:32:17,566 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:32:17,567 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:32:17,567 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:32:17,567 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:32:17,567 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:32:17,568 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:32:17,568 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:32:17,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:32:17,568 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:32:17,569 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:32:17,569 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:32:17,569 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:32:17,569 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:32:17,569 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:32:17,570 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:32:17,570 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:32:17,570 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:32:17,570 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_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c802d0dd4f8edaf03f1251784a424c8f295192f6a4e7c65ec93469eacce08251 [2023-12-02 16:32:17,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:32:17,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:32:17,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:32:17,824 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:32:17,825 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:32:17,826 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/bitvector/s3_srvr_3a_alt.BV.c.cil.c [2023-12-02 16:32:20,630 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:32:20,808 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:32:20,809 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/sv-benchmarks/c/bitvector/s3_srvr_3a_alt.BV.c.cil.c [2023-12-02 16:32:20,822 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/data/4b3f55c6d/a3722fa278e84f49b93ec0e21433fe16/FLAG7c3e5bd64 [2023-12-02 16:32:20,838 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/data/4b3f55c6d/a3722fa278e84f49b93ec0e21433fe16 [2023-12-02 16:32:20,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:32:20,842 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:32:20,843 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:32:20,844 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:32:20,849 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:32:20,850 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:32:20" (1/1) ... [2023-12-02 16:32:20,851 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d284545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:20, skipping insertion in model container [2023-12-02 16:32:20,851 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:32:20" (1/1) ... [2023-12-02 16:32:20,900 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:32:21,103 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_6fea3544-8756-4b7e-bf28-76f0841e54cb/sv-benchmarks/c/bitvector/s3_srvr_3a_alt.BV.c.cil.c[44628,44641] [2023-12-02 16:32:21,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:32:21,125 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:32:21,181 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_6fea3544-8756-4b7e-bf28-76f0841e54cb/sv-benchmarks/c/bitvector/s3_srvr_3a_alt.BV.c.cil.c[44628,44641] [2023-12-02 16:32:21,184 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:32:21,198 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:32:21,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:21 WrapperNode [2023-12-02 16:32:21,198 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:32:21,199 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:32:21,199 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:32:21,200 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:32:21,206 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:21" (1/1) ... [2023-12-02 16:32:21,217 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:21" (1/1) ... [2023-12-02 16:32:21,251 INFO L138 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 668 [2023-12-02 16:32:21,252 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:32:21,253 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:32:21,253 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:32:21,253 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:32:21,263 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:21" (1/1) ... [2023-12-02 16:32:21,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:21" (1/1) ... [2023-12-02 16:32:21,267 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:21" (1/1) ... [2023-12-02 16:32:21,267 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:21" (1/1) ... [2023-12-02 16:32:21,277 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:21" (1/1) ... [2023-12-02 16:32:21,283 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:21" (1/1) ... [2023-12-02 16:32:21,286 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:21" (1/1) ... [2023-12-02 16:32:21,288 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:21" (1/1) ... [2023-12-02 16:32:21,294 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:32:21,295 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:32:21,295 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:32:21,296 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:32:21,297 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:21" (1/1) ... [2023-12-02 16:32:21,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:32:21,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:21,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:32:21,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:32:21,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:32:21,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:32:21,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:32:21,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:32:21,492 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:32:21,495 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:32:21,518 WARN L821 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-12-02 16:32:22,054 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##103: assume !false; [2023-12-02 16:32:22,054 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##102: assume false; [2023-12-02 16:32:22,054 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:32:22,251 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:32:22,251 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 16:32:22,253 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:32:22 BoogieIcfgContainer [2023-12-02 16:32:22,253 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:32:22,256 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:32:22,256 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:32:22,259 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:32:22,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:32:20" (1/3) ... [2023-12-02 16:32:22,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a697f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:32:22, skipping insertion in model container [2023-12-02 16:32:22,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:21" (2/3) ... [2023-12-02 16:32:22,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a697f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:32:22, skipping insertion in model container [2023-12-02 16:32:22,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:32:22" (3/3) ... [2023-12-02 16:32:22,262 INFO L112 eAbstractionObserver]: Analyzing ICFG s3_srvr_3a_alt.BV.c.cil.c [2023-12-02 16:32:22,278 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:32:22,279 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:32:22,328 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:32:22,334 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;@43164977, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:32:22,334 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:32:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 104 states have (on average 1.7692307692307692) internal successors, (184), 105 states have internal predecessors, (184), 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) [2023-12-02 16:32:22,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 16:32:22,346 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:22,347 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:22,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:32:22,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:22,352 INFO L85 PathProgramCache]: Analyzing trace with hash 948562939, now seen corresponding path program 1 times [2023-12-02 16:32:22,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:22,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187183435] [2023-12-02 16:32:22,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:22,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:22,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:22,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187183435] [2023-12-02 16:32:22,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187183435] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:22,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:32:22,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:32:22,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822218416] [2023-12-02 16:32:22,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:22,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:32:22,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:22,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:32:22,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:22,749 INFO L87 Difference]: Start difference. First operand has 106 states, 104 states have (on average 1.7692307692307692) internal successors, (184), 105 states have internal predecessors, (184), 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 13.0) internal successors, (39), 2 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) [2023-12-02 16:32:23,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:23,012 INFO L93 Difference]: Finished difference Result 218 states and 378 transitions. [2023-12-02 16:32:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:32:23,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 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) Word has length 39 [2023-12-02 16:32:23,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:23,026 INFO L225 Difference]: With dead ends: 218 [2023-12-02 16:32:23,026 INFO L226 Difference]: Without dead ends: 107 [2023-12-02 16:32:23,030 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 [2023-12-02 16:32:23,034 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 5 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:23,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 199 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:32:23,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-12-02 16:32:23,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2023-12-02 16:32:23,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.4423076923076923) internal successors, (150), 104 states have internal predecessors, (150), 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) [2023-12-02 16:32:23,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 150 transitions. [2023-12-02 16:32:23,079 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 150 transitions. Word has length 39 [2023-12-02 16:32:23,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:23,080 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 150 transitions. [2023-12-02 16:32:23,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 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) [2023-12-02 16:32:23,081 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 150 transitions. [2023-12-02 16:32:23,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 16:32:23,083 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:23,083 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 16:32:23,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:32:23,084 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:32:23,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:23,085 INFO L85 PathProgramCache]: Analyzing trace with hash 76992840, now seen corresponding path program 1 times [2023-12-02 16:32:23,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:23,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286439558] [2023-12-02 16:32:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:23,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:23,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:23,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286439558] [2023-12-02 16:32:23,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286439558] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:23,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:32:23,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:32:23,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201113548] [2023-12-02 16:32:23,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:23,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:32:23,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:23,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:32:23,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:23,177 INFO L87 Difference]: Start difference. First operand 105 states and 150 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2023-12-02 16:32:23,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:23,352 INFO L93 Difference]: Finished difference Result 219 states and 319 transitions. [2023-12-02 16:32:23,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:32:23,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 53 [2023-12-02 16:32:23,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:23,355 INFO L225 Difference]: With dead ends: 219 [2023-12-02 16:32:23,355 INFO L226 Difference]: Without dead ends: 126 [2023-12-02 16:32:23,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:23,358 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 8 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:23,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 162 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:32:23,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-02 16:32:23,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2023-12-02 16:32:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3983739837398375) internal successors, (172), 123 states have internal predecessors, (172), 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) [2023-12-02 16:32:23,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 172 transitions. [2023-12-02 16:32:23,372 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 172 transitions. Word has length 53 [2023-12-02 16:32:23,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:23,373 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 172 transitions. [2023-12-02 16:32:23,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2023-12-02 16:32:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 172 transitions. [2023-12-02 16:32:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 16:32:23,376 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:23,377 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 16:32:23,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:32:23,377 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:32:23,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:23,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1457665331, now seen corresponding path program 1 times [2023-12-02 16:32:23,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:23,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487064886] [2023-12-02 16:32:23,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:23,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:23,499 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 16:32:23,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:23,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487064886] [2023-12-02 16:32:23,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487064886] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:23,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:32:23,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:32:23,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669560066] [2023-12-02 16:32:23,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:23,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:32:23,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:23,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:32:23,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:32:23,503 INFO L87 Difference]: Start difference. First operand 124 states and 172 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2023-12-02 16:32:23,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:23,741 INFO L93 Difference]: Finished difference Result 281 states and 407 transitions. [2023-12-02 16:32:23,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:32:23,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 70 [2023-12-02 16:32:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:23,744 INFO L225 Difference]: With dead ends: 281 [2023-12-02 16:32:23,744 INFO L226 Difference]: Without dead ends: 169 [2023-12-02 16:32:23,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:32:23,747 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 17 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:23,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 164 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:32:23,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-12-02 16:32:23,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 162. [2023-12-02 16:32:23,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.329192546583851) internal successors, (214), 161 states have internal predecessors, (214), 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) [2023-12-02 16:32:23,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 214 transitions. [2023-12-02 16:32:23,761 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 214 transitions. Word has length 70 [2023-12-02 16:32:23,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:23,761 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 214 transitions. [2023-12-02 16:32:23,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2023-12-02 16:32:23,762 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 214 transitions. [2023-12-02 16:32:23,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-02 16:32:23,764 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:23,764 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:23,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 16:32:23,765 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:32:23,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:23,765 INFO L85 PathProgramCache]: Analyzing trace with hash -543391969, now seen corresponding path program 1 times [2023-12-02 16:32:23,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:23,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458034833] [2023-12-02 16:32:23,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:23,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 16:32:23,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:23,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458034833] [2023-12-02 16:32:23,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458034833] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:23,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:32:23,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:32:23,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668667877] [2023-12-02 16:32:23,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:23,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:32:23,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:23,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:32:23,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:23,847 INFO L87 Difference]: Start difference. First operand 162 states and 214 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2023-12-02 16:32:23,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:23,997 INFO L93 Difference]: Finished difference Result 345 states and 469 transitions. [2023-12-02 16:32:23,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:32:23,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 90 [2023-12-02 16:32:23,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:24,000 INFO L225 Difference]: With dead ends: 345 [2023-12-02 16:32:24,000 INFO L226 Difference]: Without dead ends: 195 [2023-12-02 16:32:24,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:24,003 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 22 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:24,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 173 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:32:24,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-12-02 16:32:24,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 185. [2023-12-02 16:32:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.3043478260869565) internal successors, (240), 184 states have internal predecessors, (240), 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) [2023-12-02 16:32:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 240 transitions. [2023-12-02 16:32:24,016 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 240 transitions. Word has length 90 [2023-12-02 16:32:24,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:24,017 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 240 transitions. [2023-12-02 16:32:24,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2023-12-02 16:32:24,017 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 240 transitions. [2023-12-02 16:32:24,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 16:32:24,020 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:24,020 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:24,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 16:32:24,020 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:32:24,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:24,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1797067273, now seen corresponding path program 1 times [2023-12-02 16:32:24,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:24,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274294997] [2023-12-02 16:32:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:24,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:24,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:24,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274294997] [2023-12-02 16:32:24,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274294997] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:32:24,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431512769] [2023-12-02 16:32:24,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:24,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:24,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:24,254 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:24,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:32:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:24,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:32:24,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:24,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:32:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-12-02 16:32:24,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431512769] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 16:32:24,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:32:24,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5] total 6 [2023-12-02 16:32:24,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161673579] [2023-12-02 16:32:24,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:24,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:32:24,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:24,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:32:24,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:32:24,729 INFO L87 Difference]: Start difference. First operand 185 states and 240 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 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) [2023-12-02 16:32:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:24,799 INFO L93 Difference]: Finished difference Result 357 states and 467 transitions. [2023-12-02 16:32:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:32:24,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 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 108 [2023-12-02 16:32:24,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:24,803 INFO L225 Difference]: With dead ends: 357 [2023-12-02 16:32:24,803 INFO L226 Difference]: Without dead ends: 355 [2023-12-02 16:32:24,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:32:24,804 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 86 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:24,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 238 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:32:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-12-02 16:32:24,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 354. [2023-12-02 16:32:24,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.3144475920679888) internal successors, (464), 353 states have internal predecessors, (464), 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) [2023-12-02 16:32:24,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 464 transitions. [2023-12-02 16:32:24,824 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 464 transitions. Word has length 108 [2023-12-02 16:32:24,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:24,824 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 464 transitions. [2023-12-02 16:32:24,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 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) [2023-12-02 16:32:24,825 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 464 transitions. [2023-12-02 16:32:24,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-02 16:32:24,828 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:24,828 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:24,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:32:25,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:25,034 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:32:25,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:25,035 INFO L85 PathProgramCache]: Analyzing trace with hash -12824538, now seen corresponding path program 1 times [2023-12-02 16:32:25,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:25,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655759921] [2023-12-02 16:32:25,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:25,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:25,058 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:32:25,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560876509] [2023-12-02 16:32:25,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:25,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:25,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:25,059 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:25,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:32:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:25,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:32:25,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 16:32:25,224 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:32:25,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:25,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655759921] [2023-12-02 16:32:25,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:32:25,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560876509] [2023-12-02 16:32:25,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560876509] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:25,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:32:25,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:32:25,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17819022] [2023-12-02 16:32:25,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:25,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:32:25,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:25,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:32:25,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:25,227 INFO L87 Difference]: Start difference. First operand 354 states and 464 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-12-02 16:32:25,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:25,422 INFO L93 Difference]: Finished difference Result 778 states and 1060 transitions. [2023-12-02 16:32:25,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:32:25,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 142 [2023-12-02 16:32:25,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:25,425 INFO L225 Difference]: With dead ends: 778 [2023-12-02 16:32:25,426 INFO L226 Difference]: Without dead ends: 436 [2023-12-02 16:32:25,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:25,428 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 17 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:25,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 164 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:32:25,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-12-02 16:32:25,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 432. [2023-12-02 16:32:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.271461716937355) internal successors, (548), 431 states have internal predecessors, (548), 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) [2023-12-02 16:32:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 548 transitions. [2023-12-02 16:32:25,470 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 548 transitions. Word has length 142 [2023-12-02 16:32:25,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:25,470 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 548 transitions. [2023-12-02 16:32:25,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-12-02 16:32:25,471 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 548 transitions. [2023-12-02 16:32:25,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-02 16:32:25,473 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:25,474 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:25,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 16:32:25,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 16:32:25,675 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:32:25,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:25,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1620855562, now seen corresponding path program 1 times [2023-12-02 16:32:25,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:25,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263454028] [2023-12-02 16:32:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:25,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:25,700 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:32:25,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22642504] [2023-12-02 16:32:25,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:25,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:25,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:25,702 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:25,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:32:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:25,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:32:25,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-02 16:32:25,871 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:32:25,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:25,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263454028] [2023-12-02 16:32:25,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:32:25,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22642504] [2023-12-02 16:32:25,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22642504] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:25,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:32:25,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:32:25,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474166280] [2023-12-02 16:32:25,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:25,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:32:25,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:25,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:32:25,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:25,874 INFO L87 Difference]: Start difference. First operand 432 states and 548 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2023-12-02 16:32:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:26,072 INFO L93 Difference]: Finished difference Result 950 states and 1254 transitions. [2023-12-02 16:32:26,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:32:26,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 148 [2023-12-02 16:32:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:26,076 INFO L225 Difference]: With dead ends: 950 [2023-12-02 16:32:26,076 INFO L226 Difference]: Without dead ends: 506 [2023-12-02 16:32:26,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:26,078 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 58 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:26,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 124 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:32:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2023-12-02 16:32:26,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 490. [2023-12-02 16:32:26,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.3047034764826175) internal successors, (638), 489 states have internal predecessors, (638), 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) [2023-12-02 16:32:26,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 638 transitions. [2023-12-02 16:32:26,094 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 638 transitions. Word has length 148 [2023-12-02 16:32:26,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:26,094 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 638 transitions. [2023-12-02 16:32:26,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2023-12-02 16:32:26,095 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 638 transitions. [2023-12-02 16:32:26,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-12-02 16:32:26,097 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:26,097 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 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] [2023-12-02 16:32:26,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:32:26,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 16:32:26,298 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:32:26,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:26,299 INFO L85 PathProgramCache]: Analyzing trace with hash 496560309, now seen corresponding path program 1 times [2023-12-02 16:32:26,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:26,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009913044] [2023-12-02 16:32:26,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:26,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:26,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:26,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009913044] [2023-12-02 16:32:26,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 16:32:26,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445530617] [2023-12-02 16:32:26,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:26,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:26,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:26,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:26,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:32:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:26,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:32:26,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-12-02 16:32:26,515 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:32:26,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445530617] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:26,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:32:26,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:32:26,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184559427] [2023-12-02 16:32:26,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:26,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:32:26,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:26,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:32:26,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:26,518 INFO L87 Difference]: Start difference. First operand 490 states and 638 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2023-12-02 16:32:26,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:26,699 INFO L93 Difference]: Finished difference Result 1054 states and 1412 transitions. [2023-12-02 16:32:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:32:26,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 170 [2023-12-02 16:32:26,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:26,703 INFO L225 Difference]: With dead ends: 1054 [2023-12-02 16:32:26,703 INFO L226 Difference]: Without dead ends: 552 [2023-12-02 16:32:26,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:26,705 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 61 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:26,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 116 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:32:26,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2023-12-02 16:32:26,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 544. [2023-12-02 16:32:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 1.3406998158379373) internal successors, (728), 543 states have internal predecessors, (728), 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) [2023-12-02 16:32:26,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 728 transitions. [2023-12-02 16:32:26,722 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 728 transitions. Word has length 170 [2023-12-02 16:32:26,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:26,722 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 728 transitions. [2023-12-02 16:32:26,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2023-12-02 16:32:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 728 transitions. [2023-12-02 16:32:26,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-12-02 16:32:26,725 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:26,725 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 16:32:26,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:32:26,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:26,927 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:32:26,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:26,927 INFO L85 PathProgramCache]: Analyzing trace with hash -501762599, now seen corresponding path program 1 times [2023-12-02 16:32:26,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:26,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117833559] [2023-12-02 16:32:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:26,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:26,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:26,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117833559] [2023-12-02 16:32:26,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 16:32:26,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105201121] [2023-12-02 16:32:26,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:26,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:26,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:26,960 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:26,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:32:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:27,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:32:27,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 233 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-12-02 16:32:27,117 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:32:27,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105201121] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:27,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:32:27,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:32:27,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251097197] [2023-12-02 16:32:27,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:27,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:32:27,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:27,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:32:27,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:27,119 INFO L87 Difference]: Start difference. First operand 544 states and 728 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2023-12-02 16:32:27,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:27,289 INFO L93 Difference]: Finished difference Result 1216 states and 1678 transitions. [2023-12-02 16:32:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:32:27,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 175 [2023-12-02 16:32:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:27,294 INFO L225 Difference]: With dead ends: 1216 [2023-12-02 16:32:27,294 INFO L226 Difference]: Without dead ends: 676 [2023-12-02 16:32:27,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:27,296 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 46 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:27,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 148 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:32:27,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2023-12-02 16:32:27,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 652. [2023-12-02 16:32:27,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 1.2749615975422428) internal successors, (830), 651 states have internal predecessors, (830), 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) [2023-12-02 16:32:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 830 transitions. [2023-12-02 16:32:27,310 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 830 transitions. Word has length 175 [2023-12-02 16:32:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:27,310 INFO L495 AbstractCegarLoop]: Abstraction has 652 states and 830 transitions. [2023-12-02 16:32:27,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2023-12-02 16:32:27,311 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 830 transitions. [2023-12-02 16:32:27,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-12-02 16:32:27,313 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:27,313 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 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] [2023-12-02 16:32:27,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:32:27,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-02 16:32:27,514 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:32:27,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:27,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1333570569, now seen corresponding path program 1 times [2023-12-02 16:32:27,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:27,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082207524] [2023-12-02 16:32:27,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:27,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:27,536 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:32:27,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932979241] [2023-12-02 16:32:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:27,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:27,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:27,537 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:27,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:32:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:27,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:32:27,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2023-12-02 16:32:27,818 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:32:27,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:27,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082207524] [2023-12-02 16:32:27,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:32:27,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932979241] [2023-12-02 16:32:27,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932979241] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:27,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:32:27,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:32:27,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721120114] [2023-12-02 16:32:27,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:27,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:32:27,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:27,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:32:27,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:32:27,821 INFO L87 Difference]: Start difference. First operand 652 states and 830 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2023-12-02 16:32:28,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:28,083 INFO L93 Difference]: Finished difference Result 1397 states and 1816 transitions. [2023-12-02 16:32:28,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:32:28,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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 202 [2023-12-02 16:32:28,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:28,087 INFO L225 Difference]: With dead ends: 1397 [2023-12-02 16:32:28,088 INFO L226 Difference]: Without dead ends: 696 [2023-12-02 16:32:28,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:32:28,089 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 39 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:28,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 227 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:32:28,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2023-12-02 16:32:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 673. [2023-12-02 16:32:28,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 1.2648809523809523) internal successors, (850), 672 states have internal predecessors, (850), 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) [2023-12-02 16:32:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 850 transitions. [2023-12-02 16:32:28,109 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 850 transitions. Word has length 202 [2023-12-02 16:32:28,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:28,110 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 850 transitions. [2023-12-02 16:32:28,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2023-12-02 16:32:28,110 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 850 transitions. [2023-12-02 16:32:28,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2023-12-02 16:32:28,113 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:28,113 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:28,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 16:32:28,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 16:32:28,314 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:32:28,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:28,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2051736115, now seen corresponding path program 1 times [2023-12-02 16:32:28,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:28,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011264392] [2023-12-02 16:32:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:28,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:28,347 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:32:28,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994214716] [2023-12-02 16:32:28,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:28,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:28,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:28,349 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:28,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 16:32:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:28,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:32:28,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 442 proven. 25 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-12-02 16:32:28,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:32:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 442 proven. 25 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-12-02 16:32:28,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:28,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011264392] [2023-12-02 16:32:28,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:32:28,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994214716] [2023-12-02 16:32:28,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994214716] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:32:28,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1392333240] [2023-12-02 16:32:28,665 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2023-12-02 16:32:28,666 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:32:28,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:32:28,675 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:32:28,675 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:32:50,859 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:33:40,754 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15532#(and (<= 0 (+ |ULTIMATE.start_ssl3_accept_~ret~0#1| 2147483648)) (= |ULTIMATE.start_ssl3_accept_~blastFlag~0#1| 4) (exists ((|v_ULTIMATE.start_ssl3_accept_~ret~0#1_126| Int)) (and (= |ULTIMATE.start_ssl3_accept_~s__shutdown~0#1| 0) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__s3__tmp__reuse_message~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___9~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~tmp___6~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_ssl3_accept_~skip~0#1| 0) (<= |ULTIMATE.start_ssl3_accept_~tmp___1~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__verify_mode~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher__algo_strength~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___10~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~tmp~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__info_callback~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__cert~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___5~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~s__session__peer~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__ctx__info_callback~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~cb~0#1| 2147483648)) (= |ULTIMATE.start_ssl3_accept_~s__init_num~0#1| 0) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___6~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~s__s3__tmp__reuse_message~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~tmp___10~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_ssl3_accept_~s__hit~0#1|)) (not (= |ULTIMATE.start_ssl3_accept_~s__s3__tmp__reuse_message~0#1| 0)) (<= |ULTIMATE.start_ssl3_accept_~tmp___4~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~tmp___3~0#1| 2147483647) (<= 1 |v_ULTIMATE.start_ssl3_accept_~ret~0#1_126|) (= |ULTIMATE.start_ssl3_accept_#in~initial_state#1| 8464) (<= |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher__algorithms~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__hit~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__cert~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__info_callback~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___4~0#1| 2147483648)) (<= 0 (+ 2147483648 |ULTIMATE.start_ssl3_accept_~s__verify_mode~0#1|)) (<= |ULTIMATE.start_ssl3_accept_~tmp___9~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__debug~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__cert__pkeys__AT0__privatekey~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~s__version~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___1~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___3~0#1| 2147483648)) (= 8464 |ULTIMATE.start_main_~s~0#1|) (<= |v_ULTIMATE.start_ssl3_accept_~ret~0#1_126| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__session__peer~0#1| 2147483648)) (= 8464 |ULTIMATE.start_ssl3_accept_~initial_state#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher__algo_strength~0#1|)) (= |ULTIMATE.start_ssl3_accept_~got_new_session~0#1| 1) (<= |ULTIMATE.start_ssl3_accept_~s__options~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~Time~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~Time~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__debug~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__options~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~tmp___8~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~num1~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~tmp___2~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~tmp___5~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___8~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher__algorithms~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~s__cert__pkeys__AT0__privatekey~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~num1~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___2~0#1| 2147483648)) (= |ULTIMATE.start_ssl3_accept_~state~0#1| 8672) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__version~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~cb~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__ctx__info_callback~0#1| 2147483647))) (= |ULTIMATE.start_ssl3_accept_~s__state~0#1| 8672) (<= |ULTIMATE.start_ssl3_accept_~ret~0#1| 2147483647))' at error location [2023-12-02 16:33:40,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:33:40,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:33:40,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-12-02 16:33:40,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699636030] [2023-12-02 16:33:40,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 16:33:40,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:33:40,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:33:40,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:33:40,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=3934, Unknown=0, NotChecked=0, Total=5112 [2023-12-02 16:33:40,759 INFO L87 Difference]: Start difference. First operand 673 states and 850 transitions. Second operand has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 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) [2023-12-02 16:33:41,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:41,196 INFO L93 Difference]: Finished difference Result 2098 states and 2690 transitions. [2023-12-02 16:33:41,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:33:41,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 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 240 [2023-12-02 16:33:41,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:41,204 INFO L225 Difference]: With dead ends: 2098 [2023-12-02 16:33:41,204 INFO L226 Difference]: Without dead ends: 1391 [2023-12-02 16:33:41,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 650 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 49.8s TimeCoverageRelationStatistics Valid=1190, Invalid=4212, Unknown=0, NotChecked=0, Total=5402 [2023-12-02 16:33:41,208 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 311 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:41,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 381 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:33:41,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2023-12-02 16:33:41,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 945. [2023-12-02 16:33:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 1.3135593220338984) internal successors, (1240), 944 states have internal predecessors, (1240), 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) [2023-12-02 16:33:41,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1240 transitions. [2023-12-02 16:33:41,237 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1240 transitions. Word has length 240 [2023-12-02 16:33:41,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:41,237 INFO L495 AbstractCegarLoop]: Abstraction has 945 states and 1240 transitions. [2023-12-02 16:33:41,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 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) [2023-12-02 16:33:41,238 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1240 transitions. [2023-12-02 16:33:41,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-12-02 16:33:41,241 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:41,242 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2023-12-02 16:33:41,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 16:33:41,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 16:33:41,442 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:33:41,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:41,443 INFO L85 PathProgramCache]: Analyzing trace with hash 961391437, now seen corresponding path program 1 times [2023-12-02 16:33:41,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:33:41,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140112] [2023-12-02 16:33:41,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:41,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:33:41,467 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:33:41,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720889569] [2023-12-02 16:33:41,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:41,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:41,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:33:41,469 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:33:41,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 16:33:41,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:41,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:33:41,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 317 proven. 176 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-12-02 16:33:41,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 368 proven. 125 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-12-02 16:33:42,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:33:42,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140112] [2023-12-02 16:33:42,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:33:42,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720889569] [2023-12-02 16:33:42,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720889569] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:42,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1646662755] [2023-12-02 16:33:42,058 INFO L159 IcfgInterpreter]: Started Sifa with 55 locations of interest [2023-12-02 16:33:42,058 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:33:42,059 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:33:42,059 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:33:42,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:34:08,766 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:34:14,375 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20211#(and (= |ULTIMATE.start_ssl3_accept_~skip~0#1| 0) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~ret~0#1| 2147483648)) (= |ULTIMATE.start_ssl3_accept_~blastFlag~0#1| 4) (= |ULTIMATE.start_ssl3_accept_~s__state~0#1| 8672) (<= |ULTIMATE.start_ssl3_accept_~num1~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~ret~0#1| 2147483647))' at error location [2023-12-02 16:34:14,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:34:14,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:34:14,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-02 16:34:14,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356651762] [2023-12-02 16:34:14,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 16:34:14,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:34:14,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:34:14,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:34:14,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=734, Invalid=2806, Unknown=0, NotChecked=0, Total=3540 [2023-12-02 16:34:14,378 INFO L87 Difference]: Start difference. First operand 945 states and 1240 transitions. Second operand has 7 states, 7 states have (on average 31.285714285714285) internal successors, (219), 7 states have internal predecessors, (219), 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) [2023-12-02 16:34:15,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:34:15,020 INFO L93 Difference]: Finished difference Result 2881 states and 3814 transitions. [2023-12-02 16:34:15,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 16:34:15,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.285714285714285) internal successors, (219), 7 states have internal predecessors, (219), 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 246 [2023-12-02 16:34:15,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:34:15,028 INFO L225 Difference]: With dead ends: 2881 [2023-12-02 16:34:15,029 INFO L226 Difference]: Without dead ends: 1425 [2023-12-02 16:34:15,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=763, Invalid=3397, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 16:34:15,032 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 241 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:34:15,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 495 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:34:15,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2023-12-02 16:34:15,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1367. [2023-12-02 16:34:15,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 1.3257686676427525) internal successors, (1811), 1366 states have internal predecessors, (1811), 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) [2023-12-02 16:34:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 1811 transitions. [2023-12-02 16:34:15,058 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 1811 transitions. Word has length 246 [2023-12-02 16:34:15,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:34:15,059 INFO L495 AbstractCegarLoop]: Abstraction has 1367 states and 1811 transitions. [2023-12-02 16:34:15,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.285714285714285) internal successors, (219), 7 states have internal predecessors, (219), 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) [2023-12-02 16:34:15,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 1811 transitions. [2023-12-02 16:34:15,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-12-02 16:34:15,062 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:34:15,062 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:34:15,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 16:34:15,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 16:34:15,263 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:34:15,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:34:15,264 INFO L85 PathProgramCache]: Analyzing trace with hash 675478472, now seen corresponding path program 1 times [2023-12-02 16:34:15,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:34:15,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240311503] [2023-12-02 16:34:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:34:15,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:34:15,291 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:34:15,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323985940] [2023-12-02 16:34:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:34:15,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:34:15,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:34:15,293 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:34:15,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 16:34:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:34:15,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:34:15,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:34:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 616 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2023-12-02 16:34:15,452 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:34:15,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:34:15,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240311503] [2023-12-02 16:34:15,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:34:15,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323985940] [2023-12-02 16:34:15,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323985940] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:34:15,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:34:15,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:34:15,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848769805] [2023-12-02 16:34:15,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:34:15,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:34:15,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:34:15,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:34:15,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:34:15,454 INFO L87 Difference]: Start difference. First operand 1367 states and 1811 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2023-12-02 16:34:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:34:15,589 INFO L93 Difference]: Finished difference Result 2926 states and 3874 transitions. [2023-12-02 16:34:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:34:15,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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 302 [2023-12-02 16:34:15,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:34:15,597 INFO L225 Difference]: With dead ends: 2926 [2023-12-02 16:34:15,598 INFO L226 Difference]: Without dead ends: 1571 [2023-12-02 16:34:15,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:34:15,600 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 8 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:34:15,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 171 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:34:15,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2023-12-02 16:34:15,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1559. [2023-12-02 16:34:15,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1558 states have (on average 1.297175866495507) internal successors, (2021), 1558 states have internal predecessors, (2021), 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) [2023-12-02 16:34:15,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 2021 transitions. [2023-12-02 16:34:15,637 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 2021 transitions. Word has length 302 [2023-12-02 16:34:15,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:34:15,638 INFO L495 AbstractCegarLoop]: Abstraction has 1559 states and 2021 transitions. [2023-12-02 16:34:15,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2023-12-02 16:34:15,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 2021 transitions. [2023-12-02 16:34:15,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2023-12-02 16:34:15,641 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:34:15,641 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:34:15,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 16:34:15,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 16:34:15,847 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:34:15,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:34:15,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1119859032, now seen corresponding path program 1 times [2023-12-02 16:34:15,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:34:15,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360051438] [2023-12-02 16:34:15,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:34:15,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:34:15,876 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:34:15,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824180401] [2023-12-02 16:34:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:34:15,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:34:15,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:34:15,878 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:34:15,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fea3544-8756-4b7e-bf28-76f0841e54cb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 16:34:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:34:16,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:34:16,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:34:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 0 proven. 492 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2023-12-02 16:34:16,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:34:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 0 proven. 446 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2023-12-02 16:34:17,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:34:17,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360051438] [2023-12-02 16:34:17,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:34:17,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824180401] [2023-12-02 16:34:17,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824180401] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:34:17,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1853950564] [2023-12-02 16:34:17,310 INFO L159 IcfgInterpreter]: Started Sifa with 76 locations of interest [2023-12-02 16:34:17,310 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:34:17,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:34:17,311 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:34:17,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs