./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/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_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/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_7d9f5e20-cded-4467-a944-d714516507be/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 87db985859a6b034137d18f88e4077536120341f1ad0cccc5267e9ee4379ce7a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:11:02,129 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:11:02,189 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 03:11:02,193 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:11:02,193 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:11:02,215 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:11:02,215 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:11:02,216 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:11:02,216 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:11:02,217 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:11:02,218 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:11:02,218 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:11:02,219 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:11:02,219 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:11:02,220 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:11:02,220 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:11:02,221 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:11:02,221 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:11:02,222 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:11:02,222 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:11:02,223 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:11:02,224 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:11:02,224 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:11:02,224 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:11:02,225 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:11:02,225 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:11:02,226 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:11:02,226 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:11:02,227 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:11:02,227 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:11:02,228 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:11:02,228 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:11:02,228 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:11:02,229 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:11:02,229 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:11:02,229 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:11:02,229 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:11:02,229 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:11:02,230 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:11:02,230 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:11:02,230 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:11:02,230 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:11:02,230 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_7d9f5e20-cded-4467-a944-d714516507be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87db985859a6b034137d18f88e4077536120341f1ad0cccc5267e9ee4379ce7a [2023-11-29 03:11:02,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:11:02,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:11:02,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:11:02,493 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:11:02,494 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:11:02,495 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c [2023-11-29 03:11:05,888 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:11:06,088 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:11:06,089 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c [2023-11-29 03:11:06,098 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/data/85b051a73/1a5bd560a2f744868839ae5c033a3989/FLAG71aee6ab6 [2023-11-29 03:11:06,115 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/data/85b051a73/1a5bd560a2f744868839ae5c033a3989 [2023-11-29 03:11:06,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:11:06,120 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:11:06,122 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:11:06,122 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:11:06,128 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:11:06,129 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:11:06" (1/1) ... [2023-11-29 03:11:06,130 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62e11ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:06, skipping insertion in model container [2023-11-29 03:11:06,131 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:11:06" (1/1) ... [2023-11-29 03:11:06,157 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:11:06,317 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_7d9f5e20-cded-4467-a944-d714516507be/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c[537,550] [2023-11-29 03:11:06,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:11:06,348 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:11:06,362 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_7d9f5e20-cded-4467-a944-d714516507be/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c[537,550] [2023-11-29 03:11:06,368 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:11:06,384 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:11:06,385 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:06 WrapperNode [2023-11-29 03:11:06,385 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:11:06,386 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:11:06,387 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:11:06,387 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:11:06,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:06" (1/1) ... [2023-11-29 03:11:06,404 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:06" (1/1) ... [2023-11-29 03:11:06,426 INFO L138 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2023-11-29 03:11:06,427 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:11:06,427 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:11:06,428 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:11:06,428 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:11:06,441 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:06" (1/1) ... [2023-11-29 03:11:06,442 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:06" (1/1) ... [2023-11-29 03:11:06,443 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:06" (1/1) ... [2023-11-29 03:11:06,455 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7]. The 0 writes are split as follows [0, 0]. [2023-11-29 03:11:06,456 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:06" (1/1) ... [2023-11-29 03:11:06,456 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:06" (1/1) ... [2023-11-29 03:11:06,460 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:06" (1/1) ... [2023-11-29 03:11:06,464 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:06" (1/1) ... [2023-11-29 03:11:06,466 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:06" (1/1) ... [2023-11-29 03:11:06,467 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:06" (1/1) ... [2023-11-29 03:11:06,470 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:11:06,471 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:11:06,471 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:11:06,471 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:11:06,472 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:06" (1/1) ... [2023-11-29 03:11:06,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:11:06,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:11:06,507 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:11:06,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:11:06,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:11:06,536 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 03:11:06,536 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 03:11:06,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:11:06,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 03:11:06,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:11:06,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:11:06,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 03:11:06,537 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 03:11:06,605 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:11:06,607 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:11:06,732 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:11:06,754 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:11:06,754 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 03:11:06,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:11:06 BoogieIcfgContainer [2023-11-29 03:11:06,754 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:11:06,757 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:11:06,757 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:11:06,760 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:11:06,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:11:06" (1/3) ... [2023-11-29 03:11:06,761 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc0fc75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:11:06, skipping insertion in model container [2023-11-29 03:11:06,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:06" (2/3) ... [2023-11-29 03:11:06,762 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc0fc75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:11:06, skipping insertion in model container [2023-11-29 03:11:06,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:11:06" (3/3) ... [2023-11-29 03:11:06,763 INFO L112 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound1.c [2023-11-29 03:11:06,781 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:11:06,781 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 03:11:06,823 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:11:06,828 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;@66dc4041, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:11:06,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 03:11:06,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 03:11:06,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 03:11:06,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:11:06,841 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:11:06,841 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:11:06,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:11:06,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1925762066, now seen corresponding path program 1 times [2023-11-29 03:11:06,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:11:06,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353273036] [2023-11-29 03:11:06,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:11:06,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:11:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:11:06,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:11:06,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353273036] [2023-11-29 03:11:06,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 03:11:06,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414966606] [2023-11-29 03:11:06,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:11:06,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:11:06,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:11:06,984 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:11:06,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:11:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:11:07,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 03:11:07,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:11:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 03:11:07,107 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:11:07,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414966606] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:11:07,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:11:07,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:11:07,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060082255] [2023-11-29 03:11:07,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:11:07,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 03:11:07,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:11:07,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 03:11:07,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:11:07,149 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 03:11:07,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:11:07,177 INFO L93 Difference]: Finished difference Result 46 states and 69 transitions. [2023-11-29 03:11:07,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 03:11:07,179 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2023-11-29 03:11:07,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:11:07,187 INFO L225 Difference]: With dead ends: 46 [2023-11-29 03:11:07,187 INFO L226 Difference]: Without dead ends: 22 [2023-11-29 03:11:07,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:11:07,195 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2023-11-29 03:11:07,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:11:07,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-29 03:11:07,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-29 03:11:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 03:11:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-11-29 03:11:07,244 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 27 [2023-11-29 03:11:07,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:11:07,244 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-11-29 03:11:07,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 03:11:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-11-29 03:11:07,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 03:11:07,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:11:07,248 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:11:07,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 03:11:07,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 03:11:07,452 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:11:07,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:11:07,453 INFO L85 PathProgramCache]: Analyzing trace with hash 924491886, now seen corresponding path program 1 times [2023-11-29 03:11:07,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:11:07,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251339130] [2023-11-29 03:11:07,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:11:07,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:11:07,487 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:11:07,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500855729] [2023-11-29 03:11:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:11:07,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:11:07,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:11:07,490 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:11:07,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:11:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:11:07,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 03:11:07,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:11:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 03:11:07,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:11:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 03:11:07,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:11:07,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251339130] [2023-11-29 03:11:07,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:11:07,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500855729] [2023-11-29 03:11:07,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500855729] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:11:07,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:11:07,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-11-29 03:11:07,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810311258] [2023-11-29 03:11:07,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:11:07,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:11:07,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:11:07,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:11:07,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:11:07,982 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 03:11:12,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:11:16,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:11:17,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:11:17,095 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-11-29 03:11:17,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:11:17,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2023-11-29 03:11:17,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:11:17,097 INFO L225 Difference]: With dead ends: 34 [2023-11-29 03:11:17,097 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 03:11:17,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:11:17,099 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:11:17,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 77 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 2 Unknown, 0 Unchecked, 9.1s Time] [2023-11-29 03:11:17,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 03:11:17,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-11-29 03:11:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 03:11:17,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-11-29 03:11:17,110 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 28 [2023-11-29 03:11:17,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:11:17,111 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-11-29 03:11:17,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 03:11:17,112 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-11-29 03:11:17,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 03:11:17,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:11:17,114 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:11:17,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 03:11:17,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:11:17,315 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:11:17,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:11:17,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1239920757, now seen corresponding path program 1 times [2023-11-29 03:11:17,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:11:17,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273438165] [2023-11-29 03:11:17,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:11:17,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:11:17,342 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:11:17,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170232623] [2023-11-29 03:11:17,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:11:17,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:11:17,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:11:17,345 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:11:17,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 03:11:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:11:17,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 03:11:17,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:11:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 03:11:17,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:11:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 03:11:17,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:11:17,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273438165] [2023-11-29 03:11:17,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:11:17,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170232623] [2023-11-29 03:11:17,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170232623] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:11:17,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:11:17,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2023-11-29 03:11:17,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273362987] [2023-11-29 03:11:17,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:11:17,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:11:17,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:11:17,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:11:17,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:11:17,570 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-29 03:11:17,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:11:17,616 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2023-11-29 03:11:17,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:11:17,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 37 [2023-11-29 03:11:17,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:11:17,619 INFO L225 Difference]: With dead ends: 40 [2023-11-29 03:11:17,619 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 03:11:17,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 03:11:17,622 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:11:17,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 51 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:11:17,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 03:11:17,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-29 03:11:17,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 03:11:17,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-29 03:11:17,633 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 37 [2023-11-29 03:11:17,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:11:17,633 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-29 03:11:17,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-29 03:11:17,634 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-29 03:11:17,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 03:11:17,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:11:17,636 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:11:17,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 03:11:17,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:11:17,840 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:11:17,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:11:17,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1241708217, now seen corresponding path program 1 times [2023-11-29 03:11:17,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:11:17,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821288320] [2023-11-29 03:11:17,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:11:17,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:11:17,864 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:11:17,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604411570] [2023-11-29 03:11:17,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:11:17,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:11:17,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:11:17,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:11:17,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 03:11:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2023-11-29 03:11:18,112 WARN L124 FreeRefinementEngine]: Strategy CAMEL was unsuccessful and could not determine trace feasibility [2023-11-29 03:11:18,112 INFO L360 BasicCegarLoop]: Counterexample might be feasible [2023-11-29 03:11:18,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-29 03:11:18,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 03:11:18,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:11:18,325 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-29 03:11:18,329 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 03:11:18,348 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 03:11:18 BoogieIcfgContainer [2023-11-29 03:11:18,348 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 03:11:18,349 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 03:11:18,349 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 03:11:18,350 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 03:11:18,350 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:11:06" (3/4) ... [2023-11-29 03:11:18,352 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-29 03:11:18,354 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 03:11:18,355 INFO L158 Benchmark]: Toolchain (without parser) took 12234.53ms. Allocated memory is still 144.7MB. Free memory was 111.4MB in the beginning and 53.2MB in the end (delta: 58.2MB). Peak memory consumption was 57.8MB. Max. memory is 16.1GB. [2023-11-29 03:11:18,355 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 144.7MB. Free memory was 114.9MB in the beginning and 114.8MB in the end (delta: 29.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 03:11:18,355 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.60ms. Allocated memory is still 144.7MB. Free memory was 110.9MB in the beginning and 100.0MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 03:11:18,356 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.43ms. Allocated memory is still 144.7MB. Free memory was 100.0MB in the beginning and 98.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 03:11:18,356 INFO L158 Benchmark]: Boogie Preprocessor took 42.29ms. Allocated memory is still 144.7MB. Free memory was 98.8MB in the beginning and 96.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 03:11:18,357 INFO L158 Benchmark]: RCFGBuilder took 283.95ms. Allocated memory is still 144.7MB. Free memory was 96.8MB in the beginning and 85.3MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 03:11:18,357 INFO L158 Benchmark]: TraceAbstraction took 11591.38ms. Allocated memory is still 144.7MB. Free memory was 84.2MB in the beginning and 53.2MB in the end (delta: 31.0MB). Peak memory consumption was 30.5MB. Max. memory is 16.1GB. [2023-11-29 03:11:18,358 INFO L158 Benchmark]: Witness Printer took 4.56ms. Allocated memory is still 144.7MB. Free memory is still 53.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 03:11:18,360 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 144.7MB. Free memory was 114.9MB in the beginning and 114.8MB in the end (delta: 29.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 263.60ms. Allocated memory is still 144.7MB. Free memory was 110.9MB in the beginning and 100.0MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.43ms. Allocated memory is still 144.7MB. Free memory was 100.0MB in the beginning and 98.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.29ms. Allocated memory is still 144.7MB. Free memory was 98.8MB in the beginning and 96.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 283.95ms. Allocated memory is still 144.7MB. Free memory was 96.8MB in the beginning and 85.3MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 11591.38ms. Allocated memory is still 144.7MB. Free memory was 84.2MB in the beginning and 53.2MB in the end (delta: 31.0MB). Peak memory consumption was 30.5MB. Max. memory is 16.1GB. * Witness Printer took 4.56ms. Allocated memory is still 144.7MB. Free memory is still 53.2MB. There was no memory consumed. Max. memory is 16.1GB. * 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: 14]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int counter = 0; [L21] unsigned a, b; [L22] unsigned x, y, u, v; [L23] a = __VERIFIER_nondet_uint() [L24] b = __VERIFIER_nondet_uint() [L25] CALL assume_abort_if_not(a >= 1) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not(a >= 1) [L26] CALL assume_abort_if_not(b >= 1) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(b >= 1) [L28] CALL assume_abort_if_not(a <= 65535) [L9] COND FALSE !(!cond) [L28] RET assume_abort_if_not(a <= 65535) [L29] CALL assume_abort_if_not(b <= 65535) [L9] COND FALSE !(!cond) [L29] RET assume_abort_if_not(b <= 65535) [L31] x = a [L32] y = b [L33] u = b [L34] v = a [L36] EXPR counter++ [L36] COND TRUE counter++<1 [L37] CALL __VERIFIER_assert(x*u + y*v == 2*a*b) [L12] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(x*u + y*v == 2*a*b) [L39] COND FALSE !(!(x != y)) [L42] COND TRUE x > y [L43] x = x - y [L44] v = v + u [L36] EXPR counter++ [L36] COND FALSE !(counter++<1) [L51] CALL __VERIFIER_assert(x*u + y*v == 2*a*b) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.5s, OverallIterations: 4, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 9.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 15 SdHoareTripleChecker+Valid, 9.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14 mSDsluCounter, 156 SdHoareTripleChecker+Invalid, 9.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 84 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 51 IncrementalHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 72 mSDtfsCounter, 51 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=2, InterpolantAutomatonStates: 13, 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, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 152 ConstructedInterpolants, 0 QuantifiedInterpolants, 365 SizeOfPredicates, 3 NumberOfNonLiveVariables, 301 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 125/130 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 [2023-11-29 03:11:18,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/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_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/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_7d9f5e20-cded-4467-a944-d714516507be/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 87db985859a6b034137d18f88e4077536120341f1ad0cccc5267e9ee4379ce7a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:11:20,639 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:11:20,707 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-29 03:11:20,723 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:11:20,724 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:11:20,751 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:11:20,751 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:11:20,752 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:11:20,752 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:11:20,753 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:11:20,754 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:11:20,754 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:11:20,755 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:11:20,756 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:11:20,756 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:11:20,757 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:11:20,758 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:11:20,758 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:11:20,759 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:11:20,759 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:11:20,760 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:11:20,761 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:11:20,761 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:11:20,762 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 03:11:20,762 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 03:11:20,763 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 03:11:20,763 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:11:20,763 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:11:20,764 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:11:20,764 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:11:20,764 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:11:20,765 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:11:20,765 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:11:20,765 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:11:20,766 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:11:20,766 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:11:20,766 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:11:20,767 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 03:11:20,767 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 03:11:20,767 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:11:20,767 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:11:20,768 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:11:20,768 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:11:20,768 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:11:20,768 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 03:11:20,768 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_7d9f5e20-cded-4467-a944-d714516507be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87db985859a6b034137d18f88e4077536120341f1ad0cccc5267e9ee4379ce7a [2023-11-29 03:11:21,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:11:21,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:11:21,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:11:21,077 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:11:21,078 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:11:21,079 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c [2023-11-29 03:11:24,148 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:11:24,362 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:11:24,362 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c [2023-11-29 03:11:24,370 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/data/66ec5f25b/4fe09cf686284a7fbb2e05d760cd706e/FLAG879025a8c [2023-11-29 03:11:24,386 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/data/66ec5f25b/4fe09cf686284a7fbb2e05d760cd706e [2023-11-29 03:11:24,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:11:24,390 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:11:24,392 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:11:24,392 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:11:24,396 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:11:24,397 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:11:24" (1/1) ... [2023-11-29 03:11:24,398 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eed12f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:24, skipping insertion in model container [2023-11-29 03:11:24,398 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:11:24" (1/1) ... [2023-11-29 03:11:24,416 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:11:24,572 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_7d9f5e20-cded-4467-a944-d714516507be/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c[537,550] [2023-11-29 03:11:24,593 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:11:24,609 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:11:24,627 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_7d9f5e20-cded-4467-a944-d714516507be/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c[537,550] [2023-11-29 03:11:24,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:11:24,653 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:11:24,654 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:24 WrapperNode [2023-11-29 03:11:24,654 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:11:24,656 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:11:24,656 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:11:24,656 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:11:24,665 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:24" (1/1) ... [2023-11-29 03:11:24,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:24" (1/1) ... [2023-11-29 03:11:24,698 INFO L138 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2023-11-29 03:11:24,699 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:11:24,699 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:11:24,700 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:11:24,700 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:11:24,713 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:24" (1/1) ... [2023-11-29 03:11:24,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:24" (1/1) ... [2023-11-29 03:11:24,716 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:24" (1/1) ... [2023-11-29 03:11:24,731 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7]. The 0 writes are split as follows [0, 0]. [2023-11-29 03:11:24,731 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:24" (1/1) ... [2023-11-29 03:11:24,732 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:24" (1/1) ... [2023-11-29 03:11:24,738 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:24" (1/1) ... [2023-11-29 03:11:24,743 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:24" (1/1) ... [2023-11-29 03:11:24,745 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:24" (1/1) ... [2023-11-29 03:11:24,746 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:24" (1/1) ... [2023-11-29 03:11:24,749 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:11:24,750 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:11:24,751 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:11:24,751 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:11:24,752 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:24" (1/1) ... [2023-11-29 03:11:24,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:11:24,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:11:24,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:11:24,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:11:24,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:11:24,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 03:11:24,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 03:11:24,831 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 03:11:24,832 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 03:11:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:11:24,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:11:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 03:11:24,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 03:11:24,925 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:11:24,928 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:11:25,151 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:11:25,187 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:11:25,187 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 03:11:25,188 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:11:25 BoogieIcfgContainer [2023-11-29 03:11:25,188 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:11:25,191 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:11:25,192 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:11:25,196 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:11:25,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:11:24" (1/3) ... [2023-11-29 03:11:25,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f41051e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:11:25, skipping insertion in model container [2023-11-29 03:11:25,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:11:24" (2/3) ... [2023-11-29 03:11:25,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f41051e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:11:25, skipping insertion in model container [2023-11-29 03:11:25,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:11:25" (3/3) ... [2023-11-29 03:11:25,200 INFO L112 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound1.c [2023-11-29 03:11:25,224 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:11:25,225 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 03:11:25,285 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:11:25,294 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;@695e3b62, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:11:25,294 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 03:11:25,299 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 03:11:25,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 03:11:25,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:11:25,311 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:11:25,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:11:25,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:11:25,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1925762066, now seen corresponding path program 1 times [2023-11-29 03:11:25,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:11:25,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114238294] [2023-11-29 03:11:25,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:11:25,335 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 [2023-11-29 03:11:25,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:11:25,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/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) [2023-11-29 03:11:25,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/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 [2023-11-29 03:11:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:11:25,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 03:11:25,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:11:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 03:11:25,523 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:11:25,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:11:25,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114238294] [2023-11-29 03:11:25,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114238294] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:11:25,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:11:25,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:11:25,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581344203] [2023-11-29 03:11:25,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:11:25,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 03:11:25,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:11:25,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 03:11:25,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:11:25,574 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 03:11:25,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:11:25,609 INFO L93 Difference]: Finished difference Result 46 states and 69 transitions. [2023-11-29 03:11:25,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 03:11:25,612 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2023-11-29 03:11:25,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:11:25,622 INFO L225 Difference]: With dead ends: 46 [2023-11-29 03:11:25,622 INFO L226 Difference]: Without dead ends: 22 [2023-11-29 03:11:25,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:11:25,630 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2023-11-29 03:11:25,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:11:25,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-29 03:11:25,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-29 03:11:25,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 03:11:25,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-11-29 03:11:25,675 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 27 [2023-11-29 03:11:25,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:11:25,675 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-11-29 03:11:25,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 03:11:25,676 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-11-29 03:11:25,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 03:11:25,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:11:25,678 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:11:25,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/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 [2023-11-29 03:11:25,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/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 [2023-11-29 03:11:25,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:11:25,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:11:25,884 INFO L85 PathProgramCache]: Analyzing trace with hash 924491886, now seen corresponding path program 1 times [2023-11-29 03:11:25,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:11:25,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556962293] [2023-11-29 03:11:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:11:25,885 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 [2023-11-29 03:11:25,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:11:25,887 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/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) [2023-11-29 03:11:25,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d9f5e20-cded-4467-a944-d714516507be/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