./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4eead35b52b146e528d3235895e151889bbf52901c3f6d3c5a144d0412f9f4ac --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:03:39,393 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:03:39,528 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:03:39,538 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:03:39,539 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:03:39,586 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:03:39,587 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:03:39,587 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:03:39,589 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:03:39,594 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:03:39,595 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:03:39,596 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:03:39,597 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:03:39,599 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:03:39,600 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:03:39,600 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:03:39,601 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:03:39,601 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:03:39,602 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:03:39,602 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:03:39,603 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:03:39,604 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:03:39,605 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:03:39,606 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:03:39,607 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:03:39,607 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:03:39,608 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:03:39,608 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:03:39,609 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:03:39,609 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:03:39,611 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:03:39,611 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:03:39,611 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:03:39,612 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:03:39,612 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:03:39,613 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:03:39,613 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:39,613 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:03:39,614 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:03:39,614 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:03:39,614 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:03:39,615 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:03:39,615 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:03:39,615 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:03:39,616 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:03:39,617 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_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eead35b52b146e528d3235895e151889bbf52901c3f6d3c5a144d0412f9f4ac [2023-11-12 01:03:39,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:03:39,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:03:39,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:03:39,963 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:03:39,964 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:03:39,967 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2023-11-12 01:03:43,467 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:03:43,756 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:03:43,756 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2023-11-12 01:03:43,774 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/data/a418b0bbb/7f9eccf4f5e04f4ab4511d23f3d1687d/FLAG6bb5c67cb [2023-11-12 01:03:43,793 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/data/a418b0bbb/7f9eccf4f5e04f4ab4511d23f3d1687d [2023-11-12 01:03:43,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:03:43,799 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:03:43,801 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:03:43,801 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:03:43,808 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:03:43,809 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:03:43" (1/1) ... [2023-11-12 01:03:43,811 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@108f565f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:43, skipping insertion in model container [2023-11-12 01:03:43,811 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:03:43" (1/1) ... [2023-11-12 01:03:43,842 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:03:44,034 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_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c[709,722] [2023-11-12 01:03:44,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:03:44,089 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:03:44,108 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_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c[709,722] [2023-11-12 01:03:44,123 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:03:44,146 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:03:44,147 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:44 WrapperNode [2023-11-12 01:03:44,147 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:03:44,149 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:03:44,149 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:03:44,149 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:03:44,158 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:44" (1/1) ... [2023-11-12 01:03:44,167 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:44" (1/1) ... [2023-11-12 01:03:44,192 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2023-11-12 01:03:44,193 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:03:44,194 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:03:44,194 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:03:44,195 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:03:44,203 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:44" (1/1) ... [2023-11-12 01:03:44,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:44" (1/1) ... [2023-11-12 01:03:44,206 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:44" (1/1) ... [2023-11-12 01:03:44,206 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:44" (1/1) ... [2023-11-12 01:03:44,213 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:44" (1/1) ... [2023-11-12 01:03:44,217 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:44" (1/1) ... [2023-11-12 01:03:44,219 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:44" (1/1) ... [2023-11-12 01:03:44,220 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:44" (1/1) ... [2023-11-12 01:03:44,223 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:03:44,225 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:03:44,225 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:03:44,225 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:03:44,226 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:44" (1/1) ... [2023-11-12 01:03:44,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:44,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:44,294 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:03:44,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:03:44,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:03:44,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:03:44,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:03:44,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:03:44,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 01:03:44,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 01:03:44,470 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:03:44,474 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:03:44,790 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:03:44,810 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:03:44,811 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 01:03:44,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:03:44 BoogieIcfgContainer [2023-11-12 01:03:44,815 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:03:44,819 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:03:44,819 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:03:44,824 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:03:44,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:03:43" (1/3) ... [2023-11-12 01:03:44,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769dd8c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:03:44, skipping insertion in model container [2023-11-12 01:03:44,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:44" (2/3) ... [2023-11-12 01:03:44,827 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769dd8c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:03:44, skipping insertion in model container [2023-11-12 01:03:44,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:03:44" (3/3) ... [2023-11-12 01:03:44,829 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound50.c [2023-11-12 01:03:44,856 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:03:44,856 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:03:44,952 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:03:44,963 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;@a40eff7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:03:44,964 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:03:44,970 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 01:03:44,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 01:03:44,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:44,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 01:03:44,984 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:44,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:44,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1811081999, now seen corresponding path program 1 times [2023-11-12 01:03:45,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:45,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87976301] [2023-11-12 01:03:45,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:45,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:45,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:45,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87976301] [2023-11-12 01:03:45,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 01:03:45,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768914377] [2023-11-12 01:03:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:45,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:45,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:45,216 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:03:45,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:03:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:45,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 01:03:45,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:03:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:45,321 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:03:45,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768914377] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:45,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:45,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:03:45,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371903116] [2023-11-12 01:03:45,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:45,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 01:03:45,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:45,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 01:03:45,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 01:03:45,373 INFO L87 Difference]: Start difference. First operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:03:45,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:45,432 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2023-11-12 01:03:45,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 01:03:45,435 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-12 01:03:45,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:45,444 INFO L225 Difference]: With dead ends: 35 [2023-11-12 01:03:45,444 INFO L226 Difference]: Without dead ends: 16 [2023-11-12 01:03:45,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 01:03:45,458 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:45,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:03:45,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-12 01:03:45,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-12 01:03:45,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 01:03:45,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2023-11-12 01:03:45,525 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 6 [2023-11-12 01:03:45,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:45,526 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2023-11-12 01:03:45,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:03:45,526 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2023-11-12 01:03:45,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 01:03:45,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:45,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:45,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:03:45,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 01:03:45,738 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:45,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:45,741 INFO L85 PathProgramCache]: Analyzing trace with hash -772994646, now seen corresponding path program 1 times [2023-11-12 01:03:45,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:45,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879274176] [2023-11-12 01:03:45,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:45,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:45,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:45,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:45,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879274176] [2023-11-12 01:03:45,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 01:03:45,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011547602] [2023-11-12 01:03:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:45,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:45,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:45,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:03:45,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:03:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:45,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 01:03:45,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:03:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:45,988 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:03:45,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011547602] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:45,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:45,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:03:45,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766772203] [2023-11-12 01:03:45,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:45,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:03:45,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:45,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:03:45,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:03:45,995 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:03:46,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:46,040 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2023-11-12 01:03:46,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:03:46,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 01:03:46,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:46,042 INFO L225 Difference]: With dead ends: 27 [2023-11-12 01:03:46,042 INFO L226 Difference]: Without dead ends: 18 [2023-11-12 01:03:46,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:03:46,045 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:46,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:03:46,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-12 01:03:46,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-12 01:03:46,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 01:03:46,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-11-12 01:03:46,062 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 7 [2023-11-12 01:03:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:46,064 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-11-12 01:03:46,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:03:46,065 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-11-12 01:03:46,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 01:03:46,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:46,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:46,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 01:03:46,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:46,273 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:46,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:46,274 INFO L85 PathProgramCache]: Analyzing trace with hash -771326350, now seen corresponding path program 1 times [2023-11-12 01:03:46,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:46,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066087274] [2023-11-12 01:03:46,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:46,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:46,289 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:03:46,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349544677] [2023-11-12 01:03:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:46,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:46,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:46,292 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:03:46,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:03:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 01:03:46,364 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 01:03:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 01:03:46,392 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 01:03:46,393 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 01:03:46,395 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-12 01:03:46,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:03:46,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:46,610 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-12 01:03:46,614 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 01:03:46,629 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-11-12 01:03:46,637 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 01:03:46 BoogieIcfgContainer [2023-11-12 01:03:46,637 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 01:03:46,638 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 01:03:46,638 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 01:03:46,639 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 01:03:46,639 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:03:44" (3/4) ... [2023-11-12 01:03:46,641 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-12 01:03:46,642 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 01:03:46,643 INFO L158 Benchmark]: Toolchain (without parser) took 2844.85ms. Allocated memory is still 186.6MB. Free memory was 143.0MB in the beginning and 76.6MB in the end (delta: 66.4MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. [2023-11-12 01:03:46,644 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 127.9MB. Free memory is still 74.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 01:03:46,644 INFO L158 Benchmark]: CACSL2BoogieTranslator took 347.16ms. Allocated memory is still 186.6MB. Free memory was 142.3MB in the beginning and 131.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-12 01:03:46,645 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.40ms. Allocated memory is still 186.6MB. Free memory was 131.8MB in the beginning and 129.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 01:03:46,645 INFO L158 Benchmark]: Boogie Preprocessor took 29.62ms. Allocated memory is still 186.6MB. Free memory was 129.8MB in the beginning and 129.1MB in the end (delta: 691.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 01:03:46,646 INFO L158 Benchmark]: RCFGBuilder took 590.59ms. Allocated memory is still 186.6MB. Free memory was 129.1MB in the beginning and 117.2MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-12 01:03:46,646 INFO L158 Benchmark]: TraceAbstraction took 1818.65ms. Allocated memory is still 186.6MB. Free memory was 116.5MB in the beginning and 77.3MB in the end (delta: 39.2MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2023-11-12 01:03:46,647 INFO L158 Benchmark]: Witness Printer took 4.43ms. Allocated memory is still 186.6MB. Free memory was 77.3MB in the beginning and 76.6MB in the end (delta: 693.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 01:03:46,649 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 127.9MB. Free memory is still 74.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 347.16ms. Allocated memory is still 186.6MB. Free memory was 142.3MB in the beginning and 131.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.40ms. Allocated memory is still 186.6MB. Free memory was 131.8MB in the beginning and 129.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.62ms. Allocated memory is still 186.6MB. Free memory was 129.8MB in the beginning and 129.1MB in the end (delta: 691.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 590.59ms. Allocated memory is still 186.6MB. Free memory was 129.1MB in the beginning and 117.2MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1818.65ms. Allocated memory is still 186.6MB. Free memory was 116.5MB in the beginning and 77.3MB in the end (delta: 39.2MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * Witness Printer took 4.43ms. Allocated memory is still 186.6MB. Free memory was 77.3MB in the beginning and 76.6MB in the end (delta: 693.6kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 19]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of to_int at line 34. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [a=2, counter=0, r=1, s=13/4, x=2] [L33] EXPR counter++ VAL [a=2, counter=1, r=1, s=13/4, x=2] [L33] COND TRUE counter++<50 [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=0, counter=1] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=1] [L19] reach_error() VAL [\old(cond)=0, cond=0, counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 78 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 37 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11 IncrementalHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 41 mSDtfsCounter, 11 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 15 SizeOfPredicates, 0 NumberOfNonLiveVariables, 82 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-12 01:03:46,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4eead35b52b146e528d3235895e151889bbf52901c3f6d3c5a144d0412f9f4ac --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:03:49,730 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:03:49,864 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-12 01:03:49,871 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:03:49,872 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:03:49,903 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:03:49,904 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:03:49,905 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:03:49,906 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:03:49,907 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:03:49,908 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:03:49,908 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:03:49,909 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:03:49,910 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:03:49,911 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:03:49,912 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:03:49,913 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:03:49,914 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:03:49,915 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:03:49,915 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:03:49,916 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:03:49,917 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:03:49,918 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:03:49,918 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:03:49,919 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 01:03:49,919 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-12 01:03:49,920 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-12 01:03:49,920 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:03:49,921 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:03:49,922 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:03:49,922 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:03:49,923 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 01:03:49,923 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:03:49,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:49,924 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:03:49,925 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:03:49,925 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:03:49,925 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-12 01:03:49,926 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-12 01:03:49,926 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:03:49,927 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:03:49,927 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:03:49,928 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eead35b52b146e528d3235895e151889bbf52901c3f6d3c5a144d0412f9f4ac [2023-11-12 01:03:50,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:03:50,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:03:50,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:03:50,449 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:03:50,450 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:03:50,452 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2023-11-12 01:03:53,963 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:03:54,275 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:03:54,277 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2023-11-12 01:03:54,296 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/data/32c79b0cd/d01b62af00ce4f4e8f7982a031ec1449/FLAGdf70b8f02 [2023-11-12 01:03:54,320 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/data/32c79b0cd/d01b62af00ce4f4e8f7982a031ec1449 [2023-11-12 01:03:54,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:03:54,332 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:03:54,336 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:03:54,337 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:03:54,343 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:03:54,344 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:03:54" (1/1) ... [2023-11-12 01:03:54,346 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a19f794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:54, skipping insertion in model container [2023-11-12 01:03:54,346 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:03:54" (1/1) ... [2023-11-12 01:03:54,381 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:03:54,626 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_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c[709,722] [2023-11-12 01:03:54,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:03:54,701 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:03:54,720 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_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c[709,722] [2023-11-12 01:03:54,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:03:54,779 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:03:54,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:54 WrapperNode [2023-11-12 01:03:54,780 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:03:54,781 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:03:54,782 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:03:54,782 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:03:54,791 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:54" (1/1) ... [2023-11-12 01:03:54,820 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:54" (1/1) ... [2023-11-12 01:03:54,859 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-11-12 01:03:54,860 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:03:54,861 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:03:54,861 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:03:54,862 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:03:54,873 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:54" (1/1) ... [2023-11-12 01:03:54,874 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:54" (1/1) ... [2023-11-12 01:03:54,886 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:54" (1/1) ... [2023-11-12 01:03:54,887 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:54" (1/1) ... [2023-11-12 01:03:54,907 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:54" (1/1) ... [2023-11-12 01:03:54,917 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:54" (1/1) ... [2023-11-12 01:03:54,921 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:54" (1/1) ... [2023-11-12 01:03:54,929 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:54" (1/1) ... [2023-11-12 01:03:54,932 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:03:54,937 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:03:54,938 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:03:54,939 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:03:54,941 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:54" (1/1) ... [2023-11-12 01:03:54,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:54,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:54,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:03:55,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:03:55,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:03:55,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-12 01:03:55,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:03:55,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:03:55,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 01:03:55,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 01:03:55,154 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:03:55,158 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:03:57,896 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:03:57,904 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:03:57,904 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 01:03:57,907 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:03:57 BoogieIcfgContainer [2023-11-12 01:03:57,907 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:03:57,910 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:03:57,911 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:03:57,915 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:03:57,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:03:54" (1/3) ... [2023-11-12 01:03:57,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39295b25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:03:57, skipping insertion in model container [2023-11-12 01:03:57,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:54" (2/3) ... [2023-11-12 01:03:57,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39295b25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:03:57, skipping insertion in model container [2023-11-12 01:03:57,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:03:57" (3/3) ... [2023-11-12 01:03:57,920 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound50.c [2023-11-12 01:03:57,948 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:03:57,949 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:03:58,026 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:03:58,036 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;@2a70f154, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:03:58,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:03:58,045 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 01:03:58,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 01:03:58,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:58,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:58,058 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:58,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:58,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2023-11-12 01:03:58,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 01:03:58,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559184759] [2023-11-12 01:03:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:58,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 01:03:58,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 01:03:58,092 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-12 01:03:58,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-12 01:03:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:58,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 01:03:58,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:03:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:58,324 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:03:58,325 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 01:03:58,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559184759] [2023-11-12 01:03:58,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559184759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:58,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:58,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:03:58,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221191399] [2023-11-12 01:03:58,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:58,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 01:03:58,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 01:03:58,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 01:03:58,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 01:03:58,372 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:03:58,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:58,401 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2023-11-12 01:03:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 01:03:58,405 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 01:03:58,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:58,417 INFO L225 Difference]: With dead ends: 40 [2023-11-12 01:03:58,417 INFO L226 Difference]: Without dead ends: 17 [2023-11-12 01:03:58,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 01:03:58,428 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:58,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:03:58,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-12 01:03:58,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-12 01:03:58,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 01:03:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2023-11-12 01:03:58,482 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2023-11-12 01:03:58,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:58,483 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-11-12 01:03:58,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:03:58,483 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2023-11-12 01:03:58,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 01:03:58,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:58,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:58,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:03:58,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 01:03:58,685 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:58,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:58,686 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2023-11-12 01:03:58,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 01:03:58,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235293085] [2023-11-12 01:03:58,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:58,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 01:03:58,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 01:03:58,691 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-12 01:03:58,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-12 01:03:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:58,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 01:03:58,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:03:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:59,044 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:03:59,044 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 01:03:59,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235293085] [2023-11-12 01:03:59,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235293085] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:59,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:59,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:03:59,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585738189] [2023-11-12 01:03:59,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:59,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:03:59,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 01:03:59,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:03:59,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:03:59,050 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:03:59,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:59,145 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-11-12 01:03:59,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:03:59,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 01:03:59,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:59,148 INFO L225 Difference]: With dead ends: 28 [2023-11-12 01:03:59,148 INFO L226 Difference]: Without dead ends: 19 [2023-11-12 01:03:59,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:03:59,151 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:59,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:03:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-12 01:03:59,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-12 01:03:59,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 01:03:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-11-12 01:03:59,174 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2023-11-12 01:03:59,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:59,174 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-11-12 01:03:59,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:03:59,175 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-11-12 01:03:59,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 01:03:59,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:59,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:59,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-12 01:03:59,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 01:03:59,377 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:59,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:59,378 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2023-11-12 01:03:59,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 01:03:59,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215229192] [2023-11-12 01:03:59,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:59,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 01:03:59,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 01:03:59,382 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-12 01:03:59,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-12 01:03:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 01:03:59,538 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 01:03:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 01:03:59,670 ERROR L246 FreeRefinementEngine]: Caught known exception: Invalid model [2023-11-12 01:03:59,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1365435115] [2023-11-12 01:03:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:59,671 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-12 01:03:59,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/cvc4 [2023-11-12 01:03:59,678 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-12 01:03:59,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecdf0499-ff9c-4fea-aa28-a2fd8de026f8/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2023-11-12 01:03:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:59,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 01:03:59,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:00,250 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:04:00,252 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 01:04:00,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215229192] [2023-11-12 01:04:00,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:04:00,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1365435115] [2023-11-12 01:04:00,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1365435115] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:00,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:00,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 01:04:00,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761637693] [2023-11-12 01:04:00,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:00,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:04:00,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 01:04:00,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:04:00,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:04:00,258 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:03,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:05,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:07,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:09,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:10,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:13,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:15,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:17,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:19,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.46s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:21,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:23,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:28,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:29,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:31,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:33,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:35,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:37,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:39,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:41,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:43,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:46,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:48,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []