./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 25e51a8adaedf780ebc17d825bcf8567c6fe26dcb93621320dae5eec1509e5a5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:20:59,014 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:20:59,104 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:20:59,109 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:20:59,109 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:20:59,135 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:20:59,135 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:20:59,136 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:20:59,137 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:20:59,137 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:20:59,138 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:20:59,138 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:20:59,139 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:20:59,139 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:20:59,140 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:20:59,140 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:20:59,141 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:20:59,141 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:20:59,142 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:20:59,142 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:20:59,143 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:20:59,144 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:20:59,144 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:20:59,145 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:20:59,145 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:20:59,146 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:20:59,146 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:20:59,147 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:20:59,147 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:20:59,148 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:20:59,148 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:20:59,148 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:20:59,149 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:20:59,149 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:20:59,150 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:20:59,150 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:20:59,151 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:20:59,151 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:20:59,151 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:20:59,151 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:20:59,152 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:20:59,152 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:20:59,152 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25e51a8adaedf780ebc17d825bcf8567c6fe26dcb93621320dae5eec1509e5a5 [2023-11-28 20:20:59,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:20:59,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:20:59,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:20:59,436 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:20:59,437 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:20:59,438 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2023-11-28 20:21:02,313 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:21:02,533 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:21:02,533 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2023-11-28 20:21:02,539 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/data/83b60f2fc/d333be0be7834a0cbefcc0c2d8bfb260/FLAG999d293f5 [2023-11-28 20:21:02,555 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/data/83b60f2fc/d333be0be7834a0cbefcc0c2d8bfb260 [2023-11-28 20:21:02,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:21:02,559 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:21:02,560 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:21:02,560 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:21:02,565 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:21:02,566 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:21:02" (1/1) ... [2023-11-28 20:21:02,567 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f43a5e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:02, skipping insertion in model container [2023-11-28 20:21:02,567 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:21:02" (1/1) ... [2023-11-28 20:21:02,592 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:21:02,737 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_71f1db80-a267-4a64-85ff-6fa66296c91c/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c[709,722] [2023-11-28 20:21:02,759 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:21:02,770 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:21:02,781 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_71f1db80-a267-4a64-85ff-6fa66296c91c/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c[709,722] [2023-11-28 20:21:02,791 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:21:02,803 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:21:02,804 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:02 WrapperNode [2023-11-28 20:21:02,804 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:21:02,805 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:21:02,805 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:21:02,805 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:21:02,811 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:02" (1/1) ... [2023-11-28 20:21:02,817 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:02" (1/1) ... [2023-11-28 20:21:02,838 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2023-11-28 20:21:02,838 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:21:02,839 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:21:02,839 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:21:02,839 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:21:02,848 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:02" (1/1) ... [2023-11-28 20:21:02,848 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:02" (1/1) ... [2023-11-28 20:21:02,849 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:02" (1/1) ... [2023-11-28 20:21:02,859 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-28 20:21:02,860 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:02" (1/1) ... [2023-11-28 20:21:02,860 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:02" (1/1) ... [2023-11-28 20:21:02,865 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:02" (1/1) ... [2023-11-28 20:21:02,869 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:02" (1/1) ... [2023-11-28 20:21:02,870 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:02" (1/1) ... [2023-11-28 20:21:02,871 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:02" (1/1) ... [2023-11-28 20:21:02,873 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:21:02,874 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:21:02,874 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:21:02,874 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:21:02,875 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:02" (1/1) ... [2023-11-28 20:21:02,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:21:02,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:02,902 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:21:02,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:21:02,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:21:02,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:21:02,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:21:02,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:21:02,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-28 20:21:02,935 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-28 20:21:02,999 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:21:03,002 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:21:03,134 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:21:03,156 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:21:03,157 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-28 20:21:03,157 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:21:03 BoogieIcfgContainer [2023-11-28 20:21:03,157 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:21:03,160 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:21:03,160 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:21:03,163 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:21:03,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:21:02" (1/3) ... [2023-11-28 20:21:03,164 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61769625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:21:03, skipping insertion in model container [2023-11-28 20:21:03,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:02" (2/3) ... [2023-11-28 20:21:03,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61769625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:21:03, skipping insertion in model container [2023-11-28 20:21:03,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:21:03" (3/3) ... [2023-11-28 20:21:03,166 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound2.c [2023-11-28 20:21:03,186 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:21:03,187 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:21:03,236 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:21:03,244 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=PETRI_NET, 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;@151bd2a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:21:03,244 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:21:03,248 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) [2023-11-28 20:21:03,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-28 20:21:03,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:03,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-28 20:21:03,257 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:03,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:03,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1811081999, now seen corresponding path program 1 times [2023-11-28 20:21:03,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:03,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410130470] [2023-11-28 20:21:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:03,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:03,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:03,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410130470] [2023-11-28 20:21:03,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-28 20:21:03,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077727647] [2023-11-28 20:21:03,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:03,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:03,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:03,370 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:03,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:21:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:03,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-28 20:21:03,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:03,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:03,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077727647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:03,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:03,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:21:03,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110847548] [2023-11-28 20:21:03,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:03,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 20:21:03,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:03,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 20:21:03,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:21:03,479 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) [2023-11-28 20:21:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:03,500 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2023-11-28 20:21:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 20:21:03,503 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 [2023-11-28 20:21:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:03,510 INFO L225 Difference]: With dead ends: 35 [2023-11-28 20:21:03,510 INFO L226 Difference]: Without dead ends: 16 [2023-11-28 20:21:03,513 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 [2023-11-28 20:21:03,517 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 [2023-11-28 20:21:03,518 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] [2023-11-28 20:21:03,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-28 20:21:03,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-28 20:21:03,552 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) [2023-11-28 20:21:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2023-11-28 20:21:03,555 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 6 [2023-11-28 20:21:03,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:03,555 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2023-11-28 20:21:03,555 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) [2023-11-28 20:21:03,556 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2023-11-28 20:21:03,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-28 20:21:03,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:03,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:03,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:21:03,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-28 20:21:03,758 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:03,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:03,759 INFO L85 PathProgramCache]: Analyzing trace with hash -772994646, now seen corresponding path program 1 times [2023-11-28 20:21:03,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:03,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747325038] [2023-11-28 20:21:03,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:03,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:03,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:03,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747325038] [2023-11-28 20:21:03,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-28 20:21:03,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947906534] [2023-11-28 20:21:03,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:03,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:03,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:03,792 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:03,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:21:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:03,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:21:03,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:03,883 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:03,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947906534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:03,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:03,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:21:03,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925070299] [2023-11-28 20:21:03,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:03,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:21:03,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:03,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:21:03,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:21:03,886 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) [2023-11-28 20:21:03,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:03,907 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2023-11-28 20:21:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:21:03,907 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 [2023-11-28 20:21:03,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:03,908 INFO L225 Difference]: With dead ends: 27 [2023-11-28 20:21:03,908 INFO L226 Difference]: Without dead ends: 18 [2023-11-28 20:21:03,909 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 [2023-11-28 20:21:03,910 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 [2023-11-28 20:21:03,911 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] [2023-11-28 20:21:03,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-28 20:21:03,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-28 20:21:03,916 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) [2023-11-28 20:21:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-11-28 20:21:03,918 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 7 [2023-11-28 20:21:03,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:03,918 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-11-28 20:21:03,918 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) [2023-11-28 20:21:03,919 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-11-28 20:21:03,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-28 20:21:03,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:03,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:03,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:21:04,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:04,120 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:04,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:04,121 INFO L85 PathProgramCache]: Analyzing trace with hash -771326350, now seen corresponding path program 1 times [2023-11-28 20:21:04,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:04,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454770980] [2023-11-28 20:21:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:04,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:04,132 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:04,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767038842] [2023-11-28 20:21:04,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:04,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:04,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:04,134 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:04,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:21:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 20:21:04,174 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 20:21:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 20:21:04,192 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 20:21:04,193 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 20:21:04,194 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-28 20:21:04,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:21:04,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:04,398 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-28 20:21:04,401 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-28 20:21:04,410 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-11-28 20:21:04,416 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 08:21:04 BoogieIcfgContainer [2023-11-28 20:21:04,416 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-28 20:21:04,417 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-28 20:21:04,417 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-28 20:21:04,417 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-28 20:21:04,417 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:21:03" (3/4) ... [2023-11-28 20:21:04,419 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-28 20:21:04,419 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-28 20:21:04,420 INFO L158 Benchmark]: Toolchain (without parser) took 1861.63ms. Allocated memory is still 178.3MB. Free memory was 143.0MB in the beginning and 76.5MB in the end (delta: 66.5MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. [2023-11-28 20:21:04,420 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 123.7MB. Free memory is still 91.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-28 20:21:04,421 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.53ms. Allocated memory is still 178.3MB. Free memory was 142.4MB in the beginning and 131.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-28 20:21:04,421 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.15ms. Allocated memory is still 178.3MB. Free memory was 131.9MB in the beginning and 130.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-28 20:21:04,422 INFO L158 Benchmark]: Boogie Preprocessor took 34.72ms. Allocated memory is still 178.3MB. Free memory was 130.3MB in the beginning and 128.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-28 20:21:04,422 INFO L158 Benchmark]: RCFGBuilder took 283.16ms. Allocated memory is still 178.3MB. Free memory was 128.3MB in the beginning and 117.3MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-28 20:21:04,422 INFO L158 Benchmark]: TraceAbstraction took 1255.92ms. Allocated memory is still 178.3MB. Free memory was 116.7MB in the beginning and 76.8MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2023-11-28 20:21:04,423 INFO L158 Benchmark]: Witness Printer took 3.02ms. Allocated memory is still 178.3MB. Free memory was 76.8MB in the beginning and 76.5MB in the end (delta: 318.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-28 20:21:04,426 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 123.7MB. Free memory is still 91.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 244.53ms. Allocated memory is still 178.3MB. Free memory was 142.4MB in the beginning and 131.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.15ms. Allocated memory is still 178.3MB. Free memory was 131.9MB in the beginning and 130.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.72ms. Allocated memory is still 178.3MB. Free memory was 130.3MB in the beginning and 128.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 283.16ms. Allocated memory is still 178.3MB. Free memory was 128.3MB in the beginning and 117.3MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1255.92ms. Allocated memory is still 178.3MB. Free memory was 116.7MB in the beginning and 76.8MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * Witness Printer took 3.02ms. Allocated memory is still 178.3MB. Free memory was 76.8MB in the beginning and 76.5MB in the end (delta: 318.8kB). 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++<2 [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: 1.2s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, 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, 0.1s 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 [2023-11-28 20:21:04,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 25e51a8adaedf780ebc17d825bcf8567c6fe26dcb93621320dae5eec1509e5a5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:21:06,474 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:21:06,542 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-28 20:21:06,557 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:21:06,558 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:21:06,587 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:21:06,588 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:21:06,588 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:21:06,589 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:21:06,590 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:21:06,590 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:21:06,591 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:21:06,592 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:21:06,592 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:21:06,593 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:21:06,594 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:21:06,594 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:21:06,595 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:21:06,596 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:21:06,596 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:21:06,597 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:21:06,597 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:21:06,598 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:21:06,599 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-28 20:21:06,599 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-28 20:21:06,599 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-28 20:21:06,600 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:21:06,600 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:21:06,601 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:21:06,601 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:21:06,602 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:21:06,602 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:21:06,602 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:21:06,603 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:21:06,603 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:21:06,603 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:21:06,604 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:21:06,604 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-28 20:21:06,604 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-28 20:21:06,604 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:21:06,605 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:21:06,605 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:21:06,605 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:21:06,606 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:21:06,606 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-28 20:21:06,606 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25e51a8adaedf780ebc17d825bcf8567c6fe26dcb93621320dae5eec1509e5a5 [2023-11-28 20:21:06,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:21:06,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:21:06,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:21:06,913 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:21:06,913 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:21:06,915 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2023-11-28 20:21:09,803 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:21:10,006 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:21:10,007 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2023-11-28 20:21:10,015 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/data/cf8cd2d80/3a81b1e083ec45b4b9d585695b2bc0af/FLAGe94de8aea [2023-11-28 20:21:10,031 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/data/cf8cd2d80/3a81b1e083ec45b4b9d585695b2bc0af [2023-11-28 20:21:10,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:21:10,035 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:21:10,036 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:21:10,036 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:21:10,041 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:21:10,042 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:21:10" (1/1) ... [2023-11-28 20:21:10,043 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ef4629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:10, skipping insertion in model container [2023-11-28 20:21:10,043 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:21:10" (1/1) ... [2023-11-28 20:21:10,065 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:21:10,222 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_71f1db80-a267-4a64-85ff-6fa66296c91c/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c[709,722] [2023-11-28 20:21:10,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:21:10,260 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:21:10,273 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_71f1db80-a267-4a64-85ff-6fa66296c91c/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c[709,722] [2023-11-28 20:21:10,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:21:10,300 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:21:10,301 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:10 WrapperNode [2023-11-28 20:21:10,301 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:21:10,302 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:21:10,302 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:21:10,303 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:21:10,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:10" (1/1) ... [2023-11-28 20:21:10,319 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:10" (1/1) ... [2023-11-28 20:21:10,340 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-11-28 20:21:10,341 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:21:10,342 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:21:10,342 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:21:10,342 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:21:10,353 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:10" (1/1) ... [2023-11-28 20:21:10,354 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:10" (1/1) ... [2023-11-28 20:21:10,357 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:10" (1/1) ... [2023-11-28 20:21:10,369 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-28 20:21:10,369 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:10" (1/1) ... [2023-11-28 20:21:10,370 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:10" (1/1) ... [2023-11-28 20:21:10,377 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:10" (1/1) ... [2023-11-28 20:21:10,380 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:10" (1/1) ... [2023-11-28 20:21:10,382 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:10" (1/1) ... [2023-11-28 20:21:10,383 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:10" (1/1) ... [2023-11-28 20:21:10,386 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:21:10,387 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:21:10,388 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:21:10,388 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:21:10,389 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:10" (1/1) ... [2023-11-28 20:21:10,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:21:10,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:10,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:21:10,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:21:10,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:21:10,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-28 20:21:10,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:21:10,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:21:10,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-28 20:21:10,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-28 20:21:10,534 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:21:10,536 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:21:13,885 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:21:13,911 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:21:13,912 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-28 20:21:13,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:21:13 BoogieIcfgContainer [2023-11-28 20:21:13,913 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:21:13,916 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:21:13,916 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:21:13,920 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:21:13,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:21:10" (1/3) ... [2023-11-28 20:21:13,921 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33588f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:21:13, skipping insertion in model container [2023-11-28 20:21:13,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:10" (2/3) ... [2023-11-28 20:21:13,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33588f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:21:13, skipping insertion in model container [2023-11-28 20:21:13,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:21:13" (3/3) ... [2023-11-28 20:21:13,923 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound2.c [2023-11-28 20:21:13,943 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:21:13,943 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:21:13,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:21:13,990 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=PETRI_NET, 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;@46fbb4d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:21:13,990 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:21:13,994 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) [2023-11-28 20:21:14,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-28 20:21:14,001 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:14,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-28 20:21:14,002 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:14,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:14,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1811081999, now seen corresponding path program 1 times [2023-11-28 20:21:14,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:21:14,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119370476] [2023-11-28 20:21:14,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:14,022 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 [2023-11-28 20:21:14,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:21:14,023 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:21:14,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:21:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:14,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-28 20:21:14,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:14,188 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:14,189 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:21:14,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119370476] [2023-11-28 20:21:14,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119370476] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:14,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:14,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:21:14,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342060691] [2023-11-28 20:21:14,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:14,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 20:21:14,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:21:14,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 20:21:14,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:21:14,223 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) [2023-11-28 20:21:14,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:14,259 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2023-11-28 20:21:14,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 20:21:14,262 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 [2023-11-28 20:21:14,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:14,270 INFO L225 Difference]: With dead ends: 35 [2023-11-28 20:21:14,270 INFO L226 Difference]: Without dead ends: 16 [2023-11-28 20:21:14,273 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 [2023-11-28 20:21:14,277 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 [2023-11-28 20:21:14,278 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] [2023-11-28 20:21:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-28 20:21:14,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-28 20:21:14,314 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) [2023-11-28 20:21:14,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2023-11-28 20:21:14,317 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 6 [2023-11-28 20:21:14,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:14,317 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2023-11-28 20:21:14,318 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) [2023-11-28 20:21:14,318 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2023-11-28 20:21:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-28 20:21:14,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:14,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:14,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:21:14,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:21:14,524 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:14,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:14,525 INFO L85 PathProgramCache]: Analyzing trace with hash -772994646, now seen corresponding path program 1 times [2023-11-28 20:21:14,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:21:14,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939147546] [2023-11-28 20:21:14,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:14,526 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 [2023-11-28 20:21:14,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:21:14,528 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:21:14,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:21:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:14,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:21:14,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:14,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:14,689 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:21:14,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939147546] [2023-11-28 20:21:14,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939147546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:14,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:14,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:21:14,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400801471] [2023-11-28 20:21:14,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:14,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:21:14,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:21:14,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:21:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:21:14,693 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) [2023-11-28 20:21:14,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:14,729 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2023-11-28 20:21:14,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:21:14,730 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 [2023-11-28 20:21:14,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:14,731 INFO L225 Difference]: With dead ends: 27 [2023-11-28 20:21:14,731 INFO L226 Difference]: Without dead ends: 18 [2023-11-28 20:21:14,732 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 [2023-11-28 20:21:14,734 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 [2023-11-28 20:21:14,734 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] [2023-11-28 20:21:14,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-28 20:21:14,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-28 20:21:14,740 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) [2023-11-28 20:21:14,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-11-28 20:21:14,742 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 7 [2023-11-28 20:21:14,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:14,742 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-11-28 20:21:14,742 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) [2023-11-28 20:21:14,743 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-11-28 20:21:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-28 20:21:14,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:14,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:14,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/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)] Ended with exit code 0 [2023-11-28 20:21:14,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:21:14,944 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:14,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:14,945 INFO L85 PathProgramCache]: Analyzing trace with hash -771326350, now seen corresponding path program 1 times [2023-11-28 20:21:14,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:21:14,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136802568] [2023-11-28 20:21:14,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:14,946 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 [2023-11-28 20:21:14,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:21:14,947 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:21:14,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:21:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 20:21:15,093 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 20:21:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 20:21:15,192 ERROR L246 FreeRefinementEngine]: Caught known exception: Invalid model [2023-11-28 20:21:15,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [489977473] [2023-11-28 20:21:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:15,193 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-28 20:21:15,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 [2023-11-28 20:21:15,194 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-28 20:21:15,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2023-11-28 20:21:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:15,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:21:15,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:15,468 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:15,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:21:15,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136802568] [2023-11-28 20:21:15,469 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:15,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [489977473] [2023-11-28 20:21:15,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [489977473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:15,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:15,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:21:15,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549867802] [2023-11-28 20:21:15,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:15,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:21:15,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:21:15,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:21:15,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:21:15,472 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 5 states, 5 states have (on average 1.2) 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) [2023-11-28 20:21:17,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:21:22,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.50s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:21:26,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:21:30,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:21:37,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.24s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:21:42,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.39s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:21:46,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:21:50,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:21:54,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:21:58,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:22:02,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.44s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:22:06,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-28 20:22:06,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:06,826 INFO L93 Difference]: Finished difference Result 31 states and 42 transitions. [2023-11-28 20:22:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:22:06,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) 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 [2023-11-28 20:22:06,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:06,835 INFO L225 Difference]: With dead ends: 31 [2023-11-28 20:22:06,835 INFO L226 Difference]: Without dead ends: 29 [2023-11-28 20:22:06,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:22:06,837 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:06,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 46 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 10 Unknown, 0 Unchecked, 51.3s Time] [2023-11-28 20:22:06,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-28 20:22:06,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-11-28 20:22:06,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-28 20:22:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2023-11-28 20:22:06,848 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 7 [2023-11-28 20:22:06,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:06,848 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2023-11-28 20:22:06,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) 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) [2023-11-28 20:22:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2023-11-28 20:22:06,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-28 20:22:06,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:06,849 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:06,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2023-11-28 20:22:07,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/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)] Ended with exit code 0 [2023-11-28 20:22:07,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:22:07,250 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:07,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:07,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1515882446, now seen corresponding path program 1 times [2023-11-28 20:22:07,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:22:07,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220747526] [2023-11-28 20:22:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:07,251 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 [2023-11-28 20:22:07,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:22:07,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:22:07,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/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 (6)] Waiting until timeout for monitored process [2023-11-28 20:22:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 20:22:07,545 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 20:22:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 20:22:07,816 ERROR L246 FreeRefinementEngine]: Caught known exception: Invalid model [2023-11-28 20:22:07,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1739657034] [2023-11-28 20:22:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:07,817 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-28 20:22:07,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 [2023-11-28 20:22:07,818 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-28 20:22:07,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f1db80-a267-4a64-85ff-6fa66296c91c/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-11-28 20:22:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 20:22:08,196 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 20:22:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat