./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.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_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/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_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/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_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/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 4ac9738018cdb6c628ad42533cfecc5c9af778919d271278199945a85d10a362 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:31:57,911 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:31:57,973 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 19:31:57,977 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:31:57,978 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:31:58,004 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:31:58,005 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:31:58,005 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:31:58,006 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:31:58,006 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:31:58,007 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:31:58,007 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:31:58,008 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:31:58,008 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:31:58,009 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:31:58,009 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:31:58,010 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:31:58,010 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:31:58,011 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:31:58,011 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:31:58,012 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:31:58,013 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:31:58,013 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:31:58,014 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:31:58,014 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:31:58,015 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:31:58,015 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:31:58,015 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:31:58,016 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:31:58,016 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:31:58,017 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:31:58,017 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:31:58,017 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:31:58,018 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:31:58,018 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:31:58,018 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:31:58,018 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:31:58,018 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:31:58,019 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:31:58,019 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:31:58,019 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:31:58,019 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:31:58,020 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:31:58,020 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:31:58,020 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:31:58,020 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:31:58,020 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:31:58,020 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_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ac9738018cdb6c628ad42533cfecc5c9af778919d271278199945a85d10a362 [2023-12-02 19:31:58,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:31:58,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:31:58,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:31:58,249 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:31:58,249 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:31:58,250 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-12-02 19:32:01,024 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:32:01,204 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:32:01,204 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-12-02 19:32:01,215 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/data/70c2337d0/b58825dac8934f29b9f5f6540045eb0b/FLAG06fe816c4 [2023-12-02 19:32:01,228 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/data/70c2337d0/b58825dac8934f29b9f5f6540045eb0b [2023-12-02 19:32:01,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:32:01,232 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:32:01,233 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:32:01,233 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:32:01,237 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:32:01,238 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:32:01" (1/1) ... [2023-12-02 19:32:01,239 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70477246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:01, skipping insertion in model container [2023-12-02 19:32:01,239 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:32:01" (1/1) ... [2023-12-02 19:32:01,280 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:32:01,453 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_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4411,4424] [2023-12-02 19:32:01,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:32:01,493 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:32:01,526 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4411,4424] [2023-12-02 19:32:01,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:32:01,560 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:32:01,561 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:01 WrapperNode [2023-12-02 19:32:01,561 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:32:01,562 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:32:01,562 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:32:01,563 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:32:01,571 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:01" (1/1) ... [2023-12-02 19:32:01,580 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:01" (1/1) ... [2023-12-02 19:32:01,612 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 356 [2023-12-02 19:32:01,612 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:32:01,613 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:32:01,613 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:32:01,613 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:32:01,623 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:01" (1/1) ... [2023-12-02 19:32:01,623 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:01" (1/1) ... [2023-12-02 19:32:01,626 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:01" (1/1) ... [2023-12-02 19:32:01,627 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:01" (1/1) ... [2023-12-02 19:32:01,634 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:01" (1/1) ... [2023-12-02 19:32:01,638 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:01" (1/1) ... [2023-12-02 19:32:01,641 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:01" (1/1) ... [2023-12-02 19:32:01,643 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:01" (1/1) ... [2023-12-02 19:32:01,648 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:32:01,649 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:32:01,649 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:32:01,649 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:32:01,650 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:01" (1/1) ... [2023-12-02 19:32:01,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:32:01,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:32:01,688 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:32:01,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:32:01,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:32:01,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:32:01,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:32:01,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:32:01,826 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:32:01,828 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:32:02,152 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:32:02,286 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:32:02,286 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 19:32:02,288 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:32:02 BoogieIcfgContainer [2023-12-02 19:32:02,288 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:32:02,291 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:32:02,291 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:32:02,294 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:32:02,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:32:01" (1/3) ... [2023-12-02 19:32:02,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbe3cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:32:02, skipping insertion in model container [2023-12-02 19:32:02,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:32:01" (2/3) ... [2023-12-02 19:32:02,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbe3cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:32:02, skipping insertion in model container [2023-12-02 19:32:02,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:32:02" (3/3) ... [2023-12-02 19:32:02,297 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-12-02 19:32:02,316 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:32:02,317 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:32:02,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:32:02,376 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;@19e02f32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:32:02,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:32:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 63 states have internal predecessors, (103), 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 19:32:02,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 19:32:02,388 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:32:02,389 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] [2023-12-02 19:32:02,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:32:02,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:32:02,394 INFO L85 PathProgramCache]: Analyzing trace with hash 262034080, now seen corresponding path program 1 times [2023-12-02 19:32:02,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:32:02,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845983877] [2023-12-02 19:32:02,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:32:02,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:32:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:32:02,698 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 19:32:02,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:32:02,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845983877] [2023-12-02 19:32:02,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845983877] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:32:02,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:32:02,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:32:02,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266418696] [2023-12-02 19:32:02,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:32:02,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:32:02,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:32:02,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:32:02,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:32:02,737 INFO L87 Difference]: Start difference. First operand has 64 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 63 states have internal predecessors, (103), 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 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:32:02,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:32:02,801 INFO L93 Difference]: Finished difference Result 143 states and 218 transitions. [2023-12-02 19:32:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:32:02,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-02 19:32:02,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:32:02,812 INFO L225 Difference]: With dead ends: 143 [2023-12-02 19:32:02,812 INFO L226 Difference]: Without dead ends: 94 [2023-12-02 19:32:02,815 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 19:32:02,818 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 74 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:32:02,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 188 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:32:02,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-02 19:32:02,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2023-12-02 19:32:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.4065934065934067) internal successors, (128), 91 states have internal predecessors, (128), 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 19:32:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 128 transitions. [2023-12-02 19:32:02,852 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 128 transitions. Word has length 28 [2023-12-02 19:32:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:32:02,853 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 128 transitions. [2023-12-02 19:32:02,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:32:02,853 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 128 transitions. [2023-12-02 19:32:02,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 19:32:02,855 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:32:02,855 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] [2023-12-02 19:32:02,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:32:02,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:32:02,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:32:02,856 INFO L85 PathProgramCache]: Analyzing trace with hash -297391458, now seen corresponding path program 1 times [2023-12-02 19:32:02,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:32:02,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267892233] [2023-12-02 19:32:02,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:32:02,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:32:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:32:02,963 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 19:32:02,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:32:02,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267892233] [2023-12-02 19:32:02,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267892233] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:32:02,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:32:02,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:32:02,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331619475] [2023-12-02 19:32:02,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:32:02,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:32:02,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:32:02,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:32:02,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:32:02,967 INFO L87 Difference]: Start difference. First operand 92 states and 128 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 19:32:03,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:32:03,008 INFO L93 Difference]: Finished difference Result 216 states and 312 transitions. [2023-12-02 19:32:03,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:32:03,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 31 [2023-12-02 19:32:03,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:32:03,010 INFO L225 Difference]: With dead ends: 216 [2023-12-02 19:32:03,010 INFO L226 Difference]: Without dead ends: 143 [2023-12-02 19:32:03,011 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 19:32:03,013 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 56 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:32:03,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 150 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:32:03,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-12-02 19:32:03,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2023-12-02 19:32:03,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.4285714285714286) internal successors, (200), 140 states have internal predecessors, (200), 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 19:32:03,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 200 transitions. [2023-12-02 19:32:03,029 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 200 transitions. Word has length 31 [2023-12-02 19:32:03,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:32:03,030 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 200 transitions. [2023-12-02 19:32:03,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 19:32:03,030 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 200 transitions. [2023-12-02 19:32:03,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 19:32:03,032 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:32:03,032 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] [2023-12-02 19:32:03,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 19:32:03,032 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:32:03,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:32:03,033 INFO L85 PathProgramCache]: Analyzing trace with hash -843010126, now seen corresponding path program 1 times [2023-12-02 19:32:03,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:32:03,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757713235] [2023-12-02 19:32:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:32:03,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:32:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:32:03,111 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 19:32:03,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:32:03,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757713235] [2023-12-02 19:32:03,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757713235] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:32:03,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:32:03,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:32:03,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463822082] [2023-12-02 19:32:03,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:32:03,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:32:03,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:32:03,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:32:03,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:32:03,114 INFO L87 Difference]: Start difference. First operand 141 states and 200 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 19:32:03,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:32:03,147 INFO L93 Difference]: Finished difference Result 341 states and 494 transitions. [2023-12-02 19:32:03,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:32:03,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 34 [2023-12-02 19:32:03,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:32:03,151 INFO L225 Difference]: With dead ends: 341 [2023-12-02 19:32:03,151 INFO L226 Difference]: Without dead ends: 219 [2023-12-02 19:32:03,152 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 19:32:03,154 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 51 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:32:03,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 135 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:32:03,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-12-02 19:32:03,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2023-12-02 19:32:03,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4259259259259258) internal successors, (308), 216 states have internal predecessors, (308), 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 19:32:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 308 transitions. [2023-12-02 19:32:03,173 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 308 transitions. Word has length 34 [2023-12-02 19:32:03,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:32:03,173 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 308 transitions. [2023-12-02 19:32:03,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 19:32:03,174 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 308 transitions. [2023-12-02 19:32:03,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 19:32:03,175 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:32:03,175 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] [2023-12-02 19:32:03,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 19:32:03,176 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:32:03,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:32:03,176 INFO L85 PathProgramCache]: Analyzing trace with hash 853936617, now seen corresponding path program 1 times [2023-12-02 19:32:03,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:32:03,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096529469] [2023-12-02 19:32:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:32:03,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:32:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:32:03,328 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 19:32:03,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:32:03,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096529469] [2023-12-02 19:32:03,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096529469] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:32:03,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:32:03,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:32:03,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314062619] [2023-12-02 19:32:03,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:32:03,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:32:03,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:32:03,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:32:03,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:32:03,331 INFO L87 Difference]: Start difference. First operand 217 states and 308 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 19:32:03,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:32:03,400 INFO L93 Difference]: Finished difference Result 703 states and 1007 transitions. [2023-12-02 19:32:03,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:32:03,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 37 [2023-12-02 19:32:03,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:32:03,404 INFO L225 Difference]: With dead ends: 703 [2023-12-02 19:32:03,404 INFO L226 Difference]: Without dead ends: 505 [2023-12-02 19:32:03,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:32:03,407 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 162 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:32:03,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 267 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:32:03,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2023-12-02 19:32:03,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 501. [2023-12-02 19:32:03,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.424) internal successors, (712), 500 states have internal predecessors, (712), 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 19:32:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 712 transitions. [2023-12-02 19:32:03,435 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 712 transitions. Word has length 37 [2023-12-02 19:32:03,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:32:03,436 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 712 transitions. [2023-12-02 19:32:03,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 19:32:03,436 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 712 transitions. [2023-12-02 19:32:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 19:32:03,438 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:32:03,438 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 19:32:03,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 19:32:03,438 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:32:03,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:32:03,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1593970368, now seen corresponding path program 1 times [2023-12-02 19:32:03,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:32:03,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964124116] [2023-12-02 19:32:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:32:03,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:32:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:32:03,533 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 19:32:03,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:32:03,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964124116] [2023-12-02 19:32:03,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964124116] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:32:03,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:32:03,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:32:03,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466210877] [2023-12-02 19:32:03,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:32:03,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:32:03,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:32:03,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:32:03,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:32:03,535 INFO L87 Difference]: Start difference. First operand 501 states and 712 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 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 19:32:03,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:32:03,676 INFO L93 Difference]: Finished difference Result 1283 states and 1846 transitions. [2023-12-02 19:32:03,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:32:03,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 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 19:32:03,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:32:03,682 INFO L225 Difference]: With dead ends: 1283 [2023-12-02 19:32:03,682 INFO L226 Difference]: Without dead ends: 801 [2023-12-02 19:32:03,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:32:03,684 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 336 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:32:03,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 82 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:32:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2023-12-02 19:32:03,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 799. [2023-12-02 19:32:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 1.418546365914787) internal successors, (1132), 798 states have internal predecessors, (1132), 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 19:32:03,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1132 transitions. [2023-12-02 19:32:03,711 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1132 transitions. Word has length 39 [2023-12-02 19:32:03,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:32:03,711 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1132 transitions. [2023-12-02 19:32:03,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 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 19:32:03,711 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1132 transitions. [2023-12-02 19:32:03,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 19:32:03,713 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:32:03,713 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 19:32:03,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 19:32:03,713 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:32:03,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:32:03,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2077146171, now seen corresponding path program 1 times [2023-12-02 19:32:03,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:32:03,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321323321] [2023-12-02 19:32:03,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:32:03,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:32:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:32:04,072 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 19:32:04,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:32:04,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321323321] [2023-12-02 19:32:04,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321323321] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:32:04,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:32:04,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 19:32:04,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638439505] [2023-12-02 19:32:04,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:32:04,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 19:32:04,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:32:04,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 19:32:04,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-02 19:32:04,074 INFO L87 Difference]: Start difference. First operand 799 states and 1132 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 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 19:32:04,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:32:04,275 INFO L93 Difference]: Finished difference Result 1478 states and 2095 transitions. [2023-12-02 19:32:04,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 19:32:04,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 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 19:32:04,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:32:04,290 INFO L225 Difference]: With dead ends: 1478 [2023-12-02 19:32:04,290 INFO L226 Difference]: Without dead ends: 1476 [2023-12-02 19:32:04,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-12-02 19:32:04,292 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 461 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:32:04,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 692 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:32:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2023-12-02 19:32:04,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 936. [2023-12-02 19:32:04,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 1.4171122994652405) internal successors, (1325), 935 states have internal predecessors, (1325), 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 19:32:04,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1325 transitions. [2023-12-02 19:32:04,335 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1325 transitions. Word has length 39 [2023-12-02 19:32:04,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:32:04,336 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1325 transitions. [2023-12-02 19:32:04,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 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 19:32:04,336 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1325 transitions. [2023-12-02 19:32:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 19:32:04,339 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:32:04,339 INFO L195 NwaCegarLoop]: trace histogram [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 19:32:04,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 19:32:04,339 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:32:04,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:32:04,340 INFO L85 PathProgramCache]: Analyzing trace with hash -785035865, now seen corresponding path program 1 times [2023-12-02 19:32:04,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:32:04,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810133231] [2023-12-02 19:32:04,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:32:04,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:32:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:32:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:32:05,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:32:05,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810133231] [2023-12-02 19:32:05,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810133231] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:32:05,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652803531] [2023-12-02 19:32:05,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:32:05,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:32:05,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:32:05,282 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:32:05,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:32:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:32:05,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-02 19:32:05,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:32:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:32:06,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:32:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:32:11,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652803531] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:32:11,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1391570092] [2023-12-02 19:32:11,792 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-12-02 19:32:11,792 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:32:11,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:32:11,800 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:32:11,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:32:38,973 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:32:47,984 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7277#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= 0 ~__return_6453~0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 ~mode3~0) (<= ~mode3~0 1) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (<= ~__return_6453~0 1))' at error location [2023-12-02 19:32:47,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:32:47,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:32:47,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 41 [2023-12-02 19:32:47,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823574720] [2023-12-02 19:32:47,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:32:47,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-02 19:32:47,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:32:47,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-02 19:32:47,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=5305, Unknown=0, NotChecked=0, Total=6162 [2023-12-02 19:32:47,990 INFO L87 Difference]: Start difference. First operand 936 states and 1325 transitions. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 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 19:33:14,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:33:14,107 INFO L93 Difference]: Finished difference Result 10981 states and 15508 transitions. [2023-12-02 19:33:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2023-12-02 19:33:14,108 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 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 47 [2023-12-02 19:33:14,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:33:14,161 INFO L225 Difference]: With dead ends: 10981 [2023-12-02 19:33:14,161 INFO L226 Difference]: Without dead ends: 10092 [2023-12-02 19:33:14,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25984 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=9617, Invalid=51639, Unknown=0, NotChecked=0, Total=61256 [2023-12-02 19:33:14,180 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 6979 mSDsluCounter, 2181 mSDsCounter, 0 mSdLazyCounter, 3228 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6979 SdHoareTripleChecker+Valid, 2325 SdHoareTripleChecker+Invalid, 3645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 3228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:33:14,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6979 Valid, 2325 Invalid, 3645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 3228 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-12-02 19:33:14,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10092 states. [2023-12-02 19:33:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10092 to 4591. [2023-12-02 19:33:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4591 states, 4590 states have (on average 1.3775599128540306) internal successors, (6323), 4590 states have internal predecessors, (6323), 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 19:33:14,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 6323 transitions. [2023-12-02 19:33:14,354 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 6323 transitions. Word has length 47 [2023-12-02 19:33:14,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:33:14,354 INFO L495 AbstractCegarLoop]: Abstraction has 4591 states and 6323 transitions. [2023-12-02 19:33:14,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 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 19:33:14,355 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 6323 transitions. [2023-12-02 19:33:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 19:33:14,357 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:33:14,357 INFO L195 NwaCegarLoop]: trace histogram [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 19:33:14,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:33:14,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:33:14,559 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:33:14,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:33:14,560 INFO L85 PathProgramCache]: Analyzing trace with hash 360587774, now seen corresponding path program 1 times [2023-12-02 19:33:14,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:33:14,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964802500] [2023-12-02 19:33:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:33:14,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:33:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:33:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:33:14,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:33:14,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964802500] [2023-12-02 19:33:14,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964802500] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:33:14,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:33:14,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:33:14,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330790742] [2023-12-02 19:33:14,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:33:14,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:33:14,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:33:14,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:33:14,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:33:14,660 INFO L87 Difference]: Start difference. First operand 4591 states and 6323 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 19:33:14,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:33:14,813 INFO L93 Difference]: Finished difference Result 11576 states and 16083 transitions. [2023-12-02 19:33:14,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:33:14,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 47 [2023-12-02 19:33:14,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:33:14,855 INFO L225 Difference]: With dead ends: 11576 [2023-12-02 19:33:14,855 INFO L226 Difference]: Without dead ends: 7054 [2023-12-02 19:33:14,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:33:14,863 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 317 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:33:14,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 92 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:33:14,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7054 states. [2023-12-02 19:33:15,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7054 to 7052. [2023-12-02 19:33:15,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7052 states, 7051 states have (on average 1.377109629839739) internal successors, (9710), 7051 states have internal predecessors, (9710), 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 19:33:15,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7052 states to 7052 states and 9710 transitions. [2023-12-02 19:33:15,038 INFO L78 Accepts]: Start accepts. Automaton has 7052 states and 9710 transitions. Word has length 47 [2023-12-02 19:33:15,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:33:15,039 INFO L495 AbstractCegarLoop]: Abstraction has 7052 states and 9710 transitions. [2023-12-02 19:33:15,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 19:33:15,039 INFO L276 IsEmpty]: Start isEmpty. Operand 7052 states and 9710 transitions. [2023-12-02 19:33:15,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 19:33:15,040 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:33:15,041 INFO L195 NwaCegarLoop]: trace histogram [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 19:33:15,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 19:33:15,041 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:33:15,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:33:15,042 INFO L85 PathProgramCache]: Analyzing trace with hash -453824221, now seen corresponding path program 1 times [2023-12-02 19:33:15,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:33:15,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40536883] [2023-12-02 19:33:15,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:33:15,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:33:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:33:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:33:16,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:33:16,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40536883] [2023-12-02 19:33:16,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40536883] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:33:16,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230630663] [2023-12-02 19:33:16,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:33:16,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:33:16,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:33:16,422 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:33:16,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:33:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:33:16,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-02 19:33:16,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:33:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:33:17,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:33:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:33:22,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230630663] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:33:22,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1053249751] [2023-12-02 19:33:22,079 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-12-02 19:33:22,080 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:33:22,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:33:22,080 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:33:22,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:33:34,900 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:33:47,052 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42184#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= 0 ~__return_6453~0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 ~mode3~0) (<= ~mode2~0 1) (<= ~mode3~0 1) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (<= ~__return_6453~0 1))' at error location [2023-12-02 19:33:47,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:33:47,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:33:47,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 46 [2023-12-02 19:33:47,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654337451] [2023-12-02 19:33:47,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:33:47,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-02 19:33:47,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:33:47,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-02 19:33:47,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=5940, Unknown=0, NotChecked=0, Total=6806 [2023-12-02 19:33:47,056 INFO L87 Difference]: Start difference. First operand 7052 states and 9710 transitions. Second operand has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 46 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:34:23,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:23,736 INFO L93 Difference]: Finished difference Result 36960 states and 50930 transitions. [2023-12-02 19:34:23,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2023-12-02 19:34:23,737 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 46 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-12-02 19:34:23,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:23,815 INFO L225 Difference]: With dead ends: 36960 [2023-12-02 19:34:23,815 INFO L226 Difference]: Without dead ends: 29734 [2023-12-02 19:34:23,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31674 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=12524, Invalid=66718, Unknown=0, NotChecked=0, Total=79242 [2023-12-02 19:34:23,830 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 8190 mSDsluCounter, 3321 mSDsCounter, 0 mSdLazyCounter, 6671 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8190 SdHoareTripleChecker+Valid, 3476 SdHoareTripleChecker+Invalid, 6968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 6671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:23,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8190 Valid, 3476 Invalid, 6968 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [297 Valid, 6671 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2023-12-02 19:34:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29734 states. [2023-12-02 19:34:24,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29734 to 18758. [2023-12-02 19:34:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18758 states, 18757 states have (on average 1.3659433811377086) internal successors, (25621), 18757 states have internal predecessors, (25621), 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 19:34:24,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18758 states to 18758 states and 25621 transitions. [2023-12-02 19:34:24,184 INFO L78 Accepts]: Start accepts. Automaton has 18758 states and 25621 transitions. Word has length 47 [2023-12-02 19:34:24,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:24,184 INFO L495 AbstractCegarLoop]: Abstraction has 18758 states and 25621 transitions. [2023-12-02 19:34:24,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 46 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:34:24,185 INFO L276 IsEmpty]: Start isEmpty. Operand 18758 states and 25621 transitions. [2023-12-02 19:34:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 19:34:24,186 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:24,187 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:24,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:34:24,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:24,388 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:34:24,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:24,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1366437830, now seen corresponding path program 1 times [2023-12-02 19:34:24,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:24,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586455708] [2023-12-02 19:34:24,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:24,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:34:24,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:24,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586455708] [2023-12-02 19:34:24,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586455708] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:34:24,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:34:24,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:34:24,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977343985] [2023-12-02 19:34:24,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:34:24,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:34:24,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:34:24,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:34:24,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:34:24,492 INFO L87 Difference]: Start difference. First operand 18758 states and 25621 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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 19:34:24,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:34:24,710 INFO L93 Difference]: Finished difference Result 45941 states and 63139 transitions. [2023-12-02 19:34:24,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:34:24,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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 49 [2023-12-02 19:34:24,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:34:24,766 INFO L225 Difference]: With dead ends: 45941 [2023-12-02 19:34:24,766 INFO L226 Difference]: Without dead ends: 27285 [2023-12-02 19:34:24,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:34:24,791 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 292 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:34:24,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 102 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:34:24,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27285 states. [2023-12-02 19:34:25,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27285 to 27235. [2023-12-02 19:34:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27235 states, 27234 states have (on average 1.3632224425350665) internal successors, (37126), 27234 states have internal predecessors, (37126), 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 19:34:25,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27235 states to 27235 states and 37126 transitions. [2023-12-02 19:34:25,317 INFO L78 Accepts]: Start accepts. Automaton has 27235 states and 37126 transitions. Word has length 49 [2023-12-02 19:34:25,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:34:25,318 INFO L495 AbstractCegarLoop]: Abstraction has 27235 states and 37126 transitions. [2023-12-02 19:34:25,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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 19:34:25,319 INFO L276 IsEmpty]: Start isEmpty. Operand 27235 states and 37126 transitions. [2023-12-02 19:34:25,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 19:34:25,321 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:34:25,321 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:34:25,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 19:34:25,321 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:34:25,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:34:25,322 INFO L85 PathProgramCache]: Analyzing trace with hash 259726837, now seen corresponding path program 1 times [2023-12-02 19:34:25,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:34:25,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649896542] [2023-12-02 19:34:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:25,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:34:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:34:26,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:26,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649896542] [2023-12-02 19:34:26,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649896542] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:34:26,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229084471] [2023-12-02 19:34:26,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:34:26,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:26,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:34:26,281 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:34:26,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:34:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:26,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 19:34:26,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:34:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:34:27,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:34:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:34:32,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229084471] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:34:32,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1641157487] [2023-12-02 19:34:32,230 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2023-12-02 19:34:32,231 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:34:32,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:34:32,231 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:34:32,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:34:49,502 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:35:01,370 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '171852#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= 0 ~__return_6453~0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 ~mode3~0) (<= ~mode2~0 1) (<= ~mode3~0 1) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (<= ~__return_6453~0 1))' at error location [2023-12-02 19:35:01,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:35:01,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:35:01,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2023-12-02 19:35:01,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579930718] [2023-12-02 19:35:01,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:35:01,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-02 19:35:01,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:35:01,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-02 19:35:01,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=5337, Unknown=0, NotChecked=0, Total=6162 [2023-12-02 19:35:01,374 INFO L87 Difference]: Start difference. First operand 27235 states and 37126 transitions. Second operand has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 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 19:35:31,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:35:31,470 INFO L93 Difference]: Finished difference Result 105429 states and 143059 transitions. [2023-12-02 19:35:31,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2023-12-02 19:35:31,471 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 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 49 [2023-12-02 19:35:31,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:35:31,600 INFO L225 Difference]: With dead ends: 105429 [2023-12-02 19:35:31,600 INFO L226 Difference]: Without dead ends: 90847 [2023-12-02 19:35:31,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33670 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=10856, Invalid=65044, Unknown=0, NotChecked=0, Total=75900 [2023-12-02 19:35:31,636 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 6908 mSDsluCounter, 3495 mSDsCounter, 0 mSdLazyCounter, 4680 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6908 SdHoareTripleChecker+Valid, 3744 SdHoareTripleChecker+Invalid, 5013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 4680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:35:31,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6908 Valid, 3744 Invalid, 5013 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [333 Valid, 4680 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-12-02 19:35:31,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90847 states. [2023-12-02 19:35:32,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90847 to 54616. [2023-12-02 19:35:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54616 states, 54615 states have (on average 1.3475052641215783) internal successors, (73594), 54615 states have internal predecessors, (73594), 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 19:35:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54616 states to 54616 states and 73594 transitions. [2023-12-02 19:35:32,691 INFO L78 Accepts]: Start accepts. Automaton has 54616 states and 73594 transitions. Word has length 49 [2023-12-02 19:35:32,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:35:32,692 INFO L495 AbstractCegarLoop]: Abstraction has 54616 states and 73594 transitions. [2023-12-02 19:35:32,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 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 19:35:32,692 INFO L276 IsEmpty]: Start isEmpty. Operand 54616 states and 73594 transitions. [2023-12-02 19:35:32,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 19:35:32,694 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:35:32,694 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:35:32,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 19:35:32,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 19:35:32,895 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:35:32,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:35:32,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1126111929, now seen corresponding path program 1 times [2023-12-02 19:35:32,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:35:32,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126724708] [2023-12-02 19:35:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:35:32,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:35:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:35:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:35:36,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:35:36,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126724708] [2023-12-02 19:35:36,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126724708] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:35:36,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310228855] [2023-12-02 19:35:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:35:36,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:35:36,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:35:36,293 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:35:36,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbc9e44a-547f-4bc5-84f2-e0db233e9c85/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:35:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:35:36,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 69 conjunts are in the unsatisfiable core [2023-12-02 19:35:36,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:35:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:35:42,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:39:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:39:00,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310228855] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:39:00,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [839859790] [2023-12-02 19:39:00,191 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2023-12-02 19:39:00,191 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:39:00,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:39:00,191 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:39:00,191 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:39:19,048 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:39:31,587 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '332705#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= 0 ~__return_6453~0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 ~mode3~0) (<= ~mode2~0 1) (<= ~mode3~0 1) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 ~mode2~0) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (<= ~__return_6453~0 1))' at error location [2023-12-02 19:39:31,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:39:31,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:39:31,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 75 [2023-12-02 19:39:31,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937067817] [2023-12-02 19:39:31,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:39:31,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-12-02 19:39:31,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:39:31,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-12-02 19:39:31,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1429, Invalid=11911, Unknown=0, NotChecked=0, Total=13340 [2023-12-02 19:39:31,590 INFO L87 Difference]: Start difference. First operand 54616 states and 73594 transitions. Second operand has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 states have internal predecessors, (151), 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 19:40:26,190 WARN L293 SmtUtils]: Spent 6.01s on a formula simplification. DAG size of input: 408 DAG size of output: 212 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:40:34,254 WARN L293 SmtUtils]: Spent 7.70s on a formula simplification. DAG size of input: 389 DAG size of output: 241 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:41:13,557 WARN L293 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 389 DAG size of output: 216 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:41:24,359 WARN L293 SmtUtils]: Spent 6.44s on a formula simplification. DAG size of input: 238 DAG size of output: 285 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:41:40,206 WARN L293 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 355 DAG size of output: 211 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:41:54,139 WARN L293 SmtUtils]: Spent 12.51s on a formula simplification. DAG size of input: 345 DAG size of output: 341 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:42:22,748 WARN L293 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 394 DAG size of output: 221 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:42:32,670 WARN L293 SmtUtils]: Spent 6.36s on a formula simplification. DAG size of input: 363 DAG size of output: 220 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:42:39,527 WARN L293 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 387 DAG size of output: 213 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:42:53,151 WARN L293 SmtUtils]: Spent 12.84s on a formula simplification. DAG size of input: 353 DAG size of output: 357 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:43:06,641 WARN L293 SmtUtils]: Spent 13.09s on a formula simplification. DAG size of input: 377 DAG size of output: 355 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:43:20,878 WARN L293 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 394 DAG size of output: 200 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:43:30,495 WARN L293 SmtUtils]: Spent 6.67s on a formula simplification. DAG size of input: 350 DAG size of output: 231 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:44:09,154 WARN L293 SmtUtils]: Spent 5.69s on a formula simplification. DAG size of input: 380 DAG size of output: 209 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:44:36,496 WARN L293 SmtUtils]: Spent 12.37s on a formula simplification. DAG size of input: 344 DAG size of output: 340 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:44:56,891 WARN L293 SmtUtils]: Spent 6.82s on a formula simplification. DAG size of input: 358 DAG size of output: 240 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:45:04,549 WARN L293 SmtUtils]: Spent 7.19s on a formula simplification. DAG size of input: 382 DAG size of output: 233 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:45:30,717 WARN L293 SmtUtils]: Spent 13.14s on a formula simplification. DAG size of input: 352 DAG size of output: 348 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:45:47,525 WARN L293 SmtUtils]: Spent 13.13s on a formula simplification. DAG size of input: 376 DAG size of output: 354 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:46:18,376 WARN L293 SmtUtils]: Spent 10.92s on a formula simplification. DAG size of input: 395 DAG size of output: 344 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)