./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5 --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 0541c5d3cb2bb522edbd5a6d03bcb344a1d82e4bcd281d695c3c7a0d3bc33956 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 18:58:49,030 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 18:58:49,149 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 18:58:49,154 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 18:58:49,155 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 18:58:49,181 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 18:58:49,182 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 18:58:49,183 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 18:58:49,184 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 18:58:49,184 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 18:58:49,185 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 18:58:49,186 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 18:58:49,186 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 18:58:49,187 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 18:58:49,187 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 18:58:49,188 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 18:58:49,189 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 18:58:49,189 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 18:58:49,190 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 18:58:49,190 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 18:58:49,191 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 18:58:49,196 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 18:58:49,196 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 18:58:49,197 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 18:58:49,197 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 18:58:49,198 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 18:58:49,198 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 18:58:49,198 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 18:58:49,199 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 18:58:49,199 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 18:58:49,200 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 18:58:49,200 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 18:58:49,200 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 18:58:49,201 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 18:58:49,201 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 18:58:49,202 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 18:58:49,202 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 18:58:49,202 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:58:49,203 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 18:58:49,203 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 18:58:49,204 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 18:58:49,207 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 18:58:49,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 18:58:49,207 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 18:58:49,208 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 18:58:49,208 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 18:58:49,208 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 18:58:49,208 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_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0541c5d3cb2bb522edbd5a6d03bcb344a1d82e4bcd281d695c3c7a0d3bc33956 [2023-11-21 18:58:49,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 18:58:49,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 18:58:49,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 18:58:49,591 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 18:58:49,592 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 18:58:49,593 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i [2023-11-21 18:58:52,719 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 18:58:52,993 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 18:58:52,993 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i [2023-11-21 18:58:53,003 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/data/b9dc60fc4/cfa0306ae42b4854a77b3208596e8a8b/FLAG48073ab5a [2023-11-21 18:58:53,021 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/data/b9dc60fc4/cfa0306ae42b4854a77b3208596e8a8b [2023-11-21 18:58:53,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 18:58:53,026 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 18:58:53,028 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 18:58:53,028 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 18:58:53,035 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 18:58:53,036 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:58:53" (1/1) ... [2023-11-21 18:58:53,037 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b3a5d85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:53, skipping insertion in model container [2023-11-21 18:58:53,038 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:58:53" (1/1) ... [2023-11-21 18:58:53,063 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 18:58:53,249 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_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i[816,829] [2023-11-21 18:58:53,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:58:53,295 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 18:58:53,309 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_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i[816,829] [2023-11-21 18:58:53,348 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:58:53,367 INFO L206 MainTranslator]: Completed translation [2023-11-21 18:58:53,369 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:53 WrapperNode [2023-11-21 18:58:53,369 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 18:58:53,371 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 18:58:53,371 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 18:58:53,372 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 18:58:53,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:53" (1/1) ... [2023-11-21 18:58:53,391 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:53" (1/1) ... [2023-11-21 18:58:53,420 INFO L138 Inliner]: procedures = 16, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 132 [2023-11-21 18:58:53,420 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 18:58:53,421 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 18:58:53,421 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 18:58:53,422 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 18:58:53,432 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:53" (1/1) ... [2023-11-21 18:58:53,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:53" (1/1) ... [2023-11-21 18:58:53,436 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:53" (1/1) ... [2023-11-21 18:58:53,436 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:53" (1/1) ... [2023-11-21 18:58:53,444 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:53" (1/1) ... [2023-11-21 18:58:53,449 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:53" (1/1) ... [2023-11-21 18:58:53,451 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:53" (1/1) ... [2023-11-21 18:58:53,453 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:53" (1/1) ... [2023-11-21 18:58:53,456 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 18:58:53,457 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 18:58:53,457 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 18:58:53,457 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 18:58:53,458 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:53" (1/1) ... [2023-11-21 18:58:53,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:58:53,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:58:53,495 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 18:58:53,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 18:58:53,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 18:58:53,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 18:58:53,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 18:58:53,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 18:58:53,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 18:58:53,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 18:58:53,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 18:58:53,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 18:58:53,618 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 18:58:53,621 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 18:58:53,886 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 18:58:53,973 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 18:58:53,974 INFO L308 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-21 18:58:53,976 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:58:53 BoogieIcfgContainer [2023-11-21 18:58:53,979 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 18:58:53,983 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 18:58:53,983 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 18:58:54,002 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 18:58:54,002 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 06:58:53" (1/3) ... [2023-11-21 18:58:54,005 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222c3c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:58:54, skipping insertion in model container [2023-11-21 18:58:54,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:53" (2/3) ... [2023-11-21 18:58:54,006 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222c3c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:58:54, skipping insertion in model container [2023-11-21 18:58:54,007 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:58:53" (3/3) ... [2023-11-21 18:58:54,008 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2023-11-21 18:58:54,027 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 18:58:54,028 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 18:58:54,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 18:58:54,093 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;@2262d0d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 18:58:54,093 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 18:58:54,098 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:54,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 18:58:54,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:58:54,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:58:54,110 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:58:54,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:58:54,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1252515093, now seen corresponding path program 1 times [2023-11-21 18:58:54,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:58:54,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554811154] [2023-11-21 18:58:54,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:58:54,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:58:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:58:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:58:54,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:58:54,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554811154] [2023-11-21 18:58:54,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554811154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:58:54,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:58:54,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 18:58:54,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193239345] [2023-11-21 18:58:54,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:58:54,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:58:54,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:58:54,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:58:54,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:58:54,602 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 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 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:54,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:58:54,714 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2023-11-21 18:58:54,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:58:54,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2023-11-21 18:58:54,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:58:54,725 INFO L225 Difference]: With dead ends: 25 [2023-11-21 18:58:54,725 INFO L226 Difference]: Without dead ends: 13 [2023-11-21 18:58:54,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:58:54,732 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:58:54,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:58:54,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-21 18:58:54,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-21 18:58:54,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:54,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2023-11-21 18:58:54,771 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 19 transitions. Word has length 10 [2023-11-21 18:58:54,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:58:54,771 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 19 transitions. [2023-11-21 18:58:54,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:54,772 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 19 transitions. [2023-11-21 18:58:54,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 18:58:54,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:58:54,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:58:54,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 18:58:54,774 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:58:54,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:58:54,775 INFO L85 PathProgramCache]: Analyzing trace with hash 881812293, now seen corresponding path program 1 times [2023-11-21 18:58:54,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:58:54,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432400957] [2023-11-21 18:58:54,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:58:54,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:58:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:58:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:58:54,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:58:54,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432400957] [2023-11-21 18:58:54,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432400957] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:58:54,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814244899] [2023-11-21 18:58:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:58:54,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:58:54,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:58:54,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:58:54,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 18:58:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:58:55,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 18:58:55,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:58:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:58:55,114 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:58:55,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814244899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:58:55,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 18:58:55,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-21 18:58:55,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100622752] [2023-11-21 18:58:55,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:58:55,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:58:55,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:58:55,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:58:55,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:58:55,127 INFO L87 Difference]: Start difference. First operand 13 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:55,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:58:55,224 INFO L93 Difference]: Finished difference Result 27 states and 42 transitions. [2023-11-21 18:58:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:58:55,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2023-11-21 18:58:55,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:58:55,227 INFO L225 Difference]: With dead ends: 27 [2023-11-21 18:58:55,227 INFO L226 Difference]: Without dead ends: 18 [2023-11-21 18:58:55,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:58:55,230 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:58:55,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:58:55,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-21 18:58:55,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-21 18:58:55,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-11-21 18:58:55,248 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2023-11-21 18:58:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:58:55,249 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-11-21 18:58:55,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:55,250 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-11-21 18:58:55,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 18:58:55,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:58:55,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:58:55,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 18:58:55,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-21 18:58:55,468 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:58:55,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:58:55,469 INFO L85 PathProgramCache]: Analyzing trace with hash -621352897, now seen corresponding path program 1 times [2023-11-21 18:58:55,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:58:55,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226260555] [2023-11-21 18:58:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:58:55,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:58:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:58:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 18:58:55,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:58:55,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226260555] [2023-11-21 18:58:55,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226260555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:58:55,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067041498] [2023-11-21 18:58:55,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:58:55,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:58:55,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:58:55,720 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:58:55,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 18:58:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:58:55,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 18:58:55,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:58:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 18:58:55,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:58:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 18:58:55,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067041498] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:58:55,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [518759348] [2023-11-21 18:58:56,007 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-21 18:58:56,008 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:58:56,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:58:56,019 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:58:56,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:58:57,626 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:58:58,197 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '287#(and (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) 0)) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|)) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem15#1|))' at error location [2023-11-21 18:58:58,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 18:58:58,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:58:58,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-21 18:58:58,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417145865] [2023-11-21 18:58:58,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 18:58:58,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 18:58:58,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:58:58,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 18:58:58,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-21 18:58:58,208 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:58:58,278 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2023-11-21 18:58:58,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 18:58:58,279 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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 16 [2023-11-21 18:58:58,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:58:58,282 INFO L225 Difference]: With dead ends: 36 [2023-11-21 18:58:58,282 INFO L226 Difference]: Without dead ends: 21 [2023-11-21 18:58:58,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-21 18:58:58,287 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:58:58,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:58:58,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-21 18:58:58,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-21 18:58:58,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-11-21 18:58:58,298 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 16 [2023-11-21 18:58:58,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:58:58,298 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-11-21 18:58:58,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2023-11-21 18:58:58,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 18:58:58,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:58:58,300 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:58:58,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 18:58:58,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:58:58,520 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:58:58,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:58:58,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1509963303, now seen corresponding path program 2 times [2023-11-21 18:58:58,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:58:58,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697974566] [2023-11-21 18:58:58,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:58:58,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:58:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:58:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 18:58:58,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:58:58,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697974566] [2023-11-21 18:58:58,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697974566] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:58:58,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852868936] [2023-11-21 18:58:58,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 18:58:58,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:58:58,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:58:58,731 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:58:58,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 18:58:58,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-21 18:58:58,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 18:58:58,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 18:58:58,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:58:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 18:58:58,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:58:58,895 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 18:58:58,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852868936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:58:58,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1717192602] [2023-11-21 18:58:58,901 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-21 18:58:58,901 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:58:58,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:58:58,903 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:58:58,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:58:59,706 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:59:00,254 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '507#(and (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) 0)) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|)) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem15#1|))' at error location [2023-11-21 18:59:00,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 18:59:00,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:59:00,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-21 18:59:00,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890763921] [2023-11-21 18:59:00,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 18:59:00,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 18:59:00,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:00,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 18:59:00,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-21 18:59:00,260 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:59:00,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:00,377 INFO L93 Difference]: Finished difference Result 49 states and 74 transitions. [2023-11-21 18:59:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 18:59:00,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 19 [2023-11-21 18:59:00,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:00,378 INFO L225 Difference]: With dead ends: 49 [2023-11-21 18:59:00,378 INFO L226 Difference]: Without dead ends: 36 [2023-11-21 18:59:00,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-21 18:59:00,380 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:00,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:00,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-21 18:59:00,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-21 18:59:00,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:59:00,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-11-21 18:59:00,387 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 19 [2023-11-21 18:59:00,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:00,388 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-11-21 18:59:00,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:59:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-11-21 18:59:00,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-21 18:59:00,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:00,390 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:00,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:00,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:00,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:00,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:00,591 INFO L85 PathProgramCache]: Analyzing trace with hash 349675115, now seen corresponding path program 3 times [2023-11-21 18:59:00,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:00,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262483742] [2023-11-21 18:59:00,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:00,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-21 18:59:00,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:00,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262483742] [2023-11-21 18:59:00,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262483742] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:00,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318297391] [2023-11-21 18:59:00,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 18:59:00,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:00,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:00,885 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:00,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 18:59:01,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 18:59:01,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 18:59:01,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 18:59:01,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-21 18:59:01,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-21 18:59:01,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318297391] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:01,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [557772679] [2023-11-21 18:59:01,116 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-21 18:59:01,116 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:59:01,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:59:01,116 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:59:01,117 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:59:01,855 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:59:02,414 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '879#(and (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) 0)) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|)) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem15#1|))' at error location [2023-11-21 18:59:02,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 18:59:02,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:59:02,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-21 18:59:02,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528395648] [2023-11-21 18:59:02,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 18:59:02,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 18:59:02,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:02,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 18:59:02,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-11-21 18:59:02,417 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:59:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:02,503 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2023-11-21 18:59:02,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 18:59:02,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-21 18:59:02,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:02,504 INFO L225 Difference]: With dead ends: 72 [2023-11-21 18:59:02,504 INFO L226 Difference]: Without dead ends: 42 [2023-11-21 18:59:02,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-11-21 18:59:02,506 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:02,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:02,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-21 18:59:02,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-11-21 18:59:02,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 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) [2023-11-21 18:59:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-11-21 18:59:02,512 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 34 [2023-11-21 18:59:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:02,513 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-11-21 18:59:02,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:59:02,513 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-11-21 18:59:02,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-21 18:59:02,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:02,515 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:02,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:02,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:02,742 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:02,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:02,742 INFO L85 PathProgramCache]: Analyzing trace with hash 96014379, now seen corresponding path program 4 times [2023-11-21 18:59:02,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:02,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178189563] [2023-11-21 18:59:02,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:02,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-21 18:59:03,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:03,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178189563] [2023-11-21 18:59:03,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178189563] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:03,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994600544] [2023-11-21 18:59:03,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 18:59:03,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:03,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:03,102 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:03,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 18:59:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:03,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 18:59:03,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-21 18:59:03,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-21 18:59:03,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994600544] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:03,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [976699564] [2023-11-21 18:59:03,539 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-21 18:59:03,540 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:59:03,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:59:03,540 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:59:03,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:59:04,245 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:59:04,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1357#(and (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) 0)) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|)) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem15#1|))' at error location [2023-11-21 18:59:04,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 18:59:04,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:59:04,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-21 18:59:04,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903343559] [2023-11-21 18:59:04,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 18:59:04,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-21 18:59:04,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:04,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-21 18:59:04,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2023-11-21 18:59:04,917 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:59:05,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:05,021 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2023-11-21 18:59:05,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-21 18:59:05,022 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 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 40 [2023-11-21 18:59:05,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:05,023 INFO L225 Difference]: With dead ends: 84 [2023-11-21 18:59:05,023 INFO L226 Difference]: Without dead ends: 54 [2023-11-21 18:59:05,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 92 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2023-11-21 18:59:05,026 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:05,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:05,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-21 18:59:05,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-21 18:59:05,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:59:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-11-21 18:59:05,035 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 40 [2023-11-21 18:59:05,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:05,035 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-11-21 18:59:05,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:59:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-11-21 18:59:05,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-21 18:59:05,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:05,038 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:05,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:05,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-21 18:59:05,252 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:05,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:05,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1238170709, now seen corresponding path program 5 times [2023-11-21 18:59:05,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:05,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964265757] [2023-11-21 18:59:05,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:05,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-21 18:59:06,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:06,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964265757] [2023-11-21 18:59:06,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964265757] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:06,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349752646] [2023-11-21 18:59:06,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 18:59:06,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:06,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:06,237 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:06,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 18:59:06,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-21 18:59:06,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 18:59:06,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 18:59:06,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2023-11-21 18:59:06,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2023-11-21 18:59:06,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349752646] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:06,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1795801997] [2023-11-21 18:59:06,753 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-21 18:59:06,754 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:59:06,754 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:59:06,754 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:59:06,754 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:59:07,397 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:59:07,892 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1965#(and (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) 0)) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|)) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem15#1|))' at error location [2023-11-21 18:59:07,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 18:59:07,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:59:07,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2023-11-21 18:59:07,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319369352] [2023-11-21 18:59:07,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 18:59:07,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-21 18:59:07,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:07,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-21 18:59:07,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2023-11-21 18:59:07,896 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:59:08,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:08,176 INFO L93 Difference]: Finished difference Result 115 states and 157 transitions. [2023-11-21 18:59:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-21 18:59:08,177 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 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 52 [2023-11-21 18:59:08,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:08,181 INFO L225 Difference]: With dead ends: 115 [2023-11-21 18:59:08,182 INFO L226 Difference]: Without dead ends: 85 [2023-11-21 18:59:08,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2023-11-21 18:59:08,186 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:08,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 18:59:08,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-21 18:59:08,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-11-21 18:59:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:59:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2023-11-21 18:59:08,206 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 52 [2023-11-21 18:59:08,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:08,206 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2023-11-21 18:59:08,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:59:08,207 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2023-11-21 18:59:08,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-21 18:59:08,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:08,209 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:08,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:08,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-21 18:59:08,428 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:08,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:08,429 INFO L85 PathProgramCache]: Analyzing trace with hash 2047000965, now seen corresponding path program 6 times [2023-11-21 18:59:08,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:08,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67698254] [2023-11-21 18:59:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:08,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:09,591 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-21 18:59:09,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:09,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67698254] [2023-11-21 18:59:09,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67698254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:09,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112811208] [2023-11-21 18:59:09,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 18:59:09,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:09,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:09,593 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:09,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 18:59:09,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 18:59:09,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 18:59:09,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-21 18:59:09,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-21 18:59:09,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-21 18:59:10,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112811208] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:10,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [387922333] [2023-11-21 18:59:10,798 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-21 18:59:10,798 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:59:10,799 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:59:10,799 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:59:10,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:59:11,481 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:59:12,984 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2899#(and (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) 0)) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|)) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem15#1|))' at error location [2023-11-21 18:59:12,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 18:59:12,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:59:12,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2023-11-21 18:59:12,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976202178] [2023-11-21 18:59:12,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 18:59:12,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-21 18:59:12,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:12,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-21 18:59:12,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2023-11-21 18:59:12,990 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:59:13,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:13,115 INFO L93 Difference]: Finished difference Result 170 states and 206 transitions. [2023-11-21 18:59:13,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-21 18:59:13,115 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 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 83 [2023-11-21 18:59:13,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:13,116 INFO L225 Difference]: With dead ends: 170 [2023-11-21 18:59:13,117 INFO L226 Difference]: Without dead ends: 110 [2023-11-21 18:59:13,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 196 SyntacticMatches, 22 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2036 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2023-11-21 18:59:13,119 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:13,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:13,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-21 18:59:13,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-11-21 18:59:13,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0642201834862386) internal successors, (116), 109 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:59:13,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2023-11-21 18:59:13,130 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 83 [2023-11-21 18:59:13,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:13,131 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2023-11-21 18:59:13,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:59:13,131 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2023-11-21 18:59:13,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-21 18:59:13,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:13,134 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:13,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:13,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:13,356 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:13,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:13,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1297138325, now seen corresponding path program 7 times [2023-11-21 18:59:13,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:13,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163945816] [2023-11-21 18:59:13,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:13,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-21 18:59:16,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:16,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163945816] [2023-11-21 18:59:16,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163945816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:16,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361200826] [2023-11-21 18:59:16,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 18:59:16,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:16,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:16,548 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:16,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 18:59:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:16,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-21 18:59:16,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-21 18:59:17,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-21 18:59:20,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361200826] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:20,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2107092127] [2023-11-21 18:59:20,220 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-21 18:59:20,221 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:59:20,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:59:20,221 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:59:20,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:59:20,839 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:59:21,447 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4193#(and (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) 0)) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|)) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem15#1|))' at error location [2023-11-21 18:59:21,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 18:59:21,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:59:21,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2023-11-21 18:59:21,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679409206] [2023-11-21 18:59:21,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 18:59:21,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-21 18:59:21,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:21,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-21 18:59:21,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2023-11-21 18:59:21,457 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:59:21,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:21,670 INFO L93 Difference]: Finished difference Result 220 states and 281 transitions. [2023-11-21 18:59:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-21 18:59:21,670 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2023-11-21 18:59:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:21,672 INFO L225 Difference]: With dead ends: 220 [2023-11-21 18:59:21,672 INFO L226 Difference]: Without dead ends: 160 [2023-11-21 18:59:21,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2023-11-21 18:59:21,683 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:21,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:21,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-21 18:59:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2023-11-21 18:59:21,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0440251572327044) internal successors, (166), 159 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:59:21,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 166 transitions. [2023-11-21 18:59:21,712 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 166 transitions. Word has length 108 [2023-11-21 18:59:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:21,713 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 166 transitions. [2023-11-21 18:59:21,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:59:21,713 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 166 transitions. [2023-11-21 18:59:21,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-21 18:59:21,721 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:21,721 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:21,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:21,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-21 18:59:21,944 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:21,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:21,945 INFO L85 PathProgramCache]: Analyzing trace with hash 598230699, now seen corresponding path program 8 times [2023-11-21 18:59:21,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:21,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482637370] [2023-11-21 18:59:21,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:21,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5126 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-21 18:59:31,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:31,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482637370] [2023-11-21 18:59:31,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482637370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:31,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276973502] [2023-11-21 18:59:31,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 18:59:31,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:31,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:31,480 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:31,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0cdc28-64a7-4d1a-a078-10fc93c6dc27/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process