./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI --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 87608ec580cc80a59c7836f9aeadd0fc773dea5ebb620dd020651936daa4e397 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:02:44,171 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:02:44,306 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 22:02:44,313 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:02:44,314 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:02:44,351 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:02:44,353 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:02:44,354 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:02:44,355 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:02:44,360 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:02:44,361 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:02:44,362 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:02:44,363 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:02:44,365 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:02:44,366 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:02:44,366 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:02:44,367 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 22:02:44,367 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:02:44,368 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:02:44,368 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:02:44,369 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:02:44,369 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 22:02:44,370 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:02:44,371 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 22:02:44,371 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:02:44,372 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 22:02:44,372 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:02:44,373 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:02:44,374 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:02:44,374 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:02:44,376 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:02:44,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:02:44,377 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:02:44,377 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:02:44,377 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 22:02:44,377 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:02:44,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:02:44,378 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:02:44,378 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:02:44,379 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 22:02:44,379 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:02:44,380 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:02:44,380 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_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87608ec580cc80a59c7836f9aeadd0fc773dea5ebb620dd020651936daa4e397 [2023-11-24 22:02:44,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:02:44,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:02:44,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:02:44,729 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:02:44,730 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:02:44,731 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c [2023-11-24 22:02:47,815 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:02:48,107 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:02:48,109 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c [2023-11-24 22:02:48,119 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/data/1cd8b00b1/816897b12f8f49d599e6bc5e54c1d1f1/FLAG50f9c5853 [2023-11-24 22:02:48,145 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/data/1cd8b00b1/816897b12f8f49d599e6bc5e54c1d1f1 [2023-11-24 22:02:48,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:02:48,153 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:02:48,157 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:02:48,157 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:02:48,163 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:02:48,164 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:02:48" (1/1) ... [2023-11-24 22:02:48,165 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25dc66cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:48, skipping insertion in model container [2023-11-24 22:02:48,165 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:02:48" (1/1) ... [2023-11-24 22:02:48,200 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:02:48,405 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_cbcd9942-df5c-4f07-aa00-215b2ed5b929/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c[458,471] [2023-11-24 22:02:48,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:02:48,443 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:02:48,456 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_cbcd9942-df5c-4f07-aa00-215b2ed5b929/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c[458,471] [2023-11-24 22:02:48,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:02:48,479 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:02:48,479 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:48 WrapperNode [2023-11-24 22:02:48,479 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:02:48,481 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:02:48,481 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:02:48,481 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:02:48,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:48" (1/1) ... [2023-11-24 22:02:48,497 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:48" (1/1) ... [2023-11-24 22:02:48,526 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2023-11-24 22:02:48,526 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:02:48,527 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:02:48,528 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:02:48,528 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:02:48,540 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:48" (1/1) ... [2023-11-24 22:02:48,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:48" (1/1) ... [2023-11-24 22:02:48,555 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:48" (1/1) ... [2023-11-24 22:02:48,565 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-24 22:02:48,566 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:48" (1/1) ... [2023-11-24 22:02:48,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:48" (1/1) ... [2023-11-24 22:02:48,569 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:48" (1/1) ... [2023-11-24 22:02:48,572 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:48" (1/1) ... [2023-11-24 22:02:48,573 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:48" (1/1) ... [2023-11-24 22:02:48,574 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:48" (1/1) ... [2023-11-24 22:02:48,576 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:02:48,577 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:02:48,577 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:02:48,577 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:02:48,578 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:48" (1/1) ... [2023-11-24 22:02:48,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:02:48,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:48,623 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:02:48,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:02:48,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:02:48,661 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 22:02:48,661 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 22:02:48,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:02:48,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:02:48,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:02:48,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 22:02:48,662 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 22:02:48,732 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:02:48,735 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:02:48,878 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:02:48,899 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:02:48,900 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 22:02:48,900 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:02:48 BoogieIcfgContainer [2023-11-24 22:02:48,900 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:02:48,903 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:02:48,903 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:02:48,907 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:02:48,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:02:48" (1/3) ... [2023-11-24 22:02:48,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54780375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:02:48, skipping insertion in model container [2023-11-24 22:02:48,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:48" (2/3) ... [2023-11-24 22:02:48,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54780375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:02:48, skipping insertion in model container [2023-11-24 22:02:48,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:02:48" (3/3) ... [2023-11-24 22:02:48,910 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound1.c [2023-11-24 22:02:48,930 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:02:48,930 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 22:02:48,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:02:48,988 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;@102a4f58, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:02:48,988 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 22:02:48,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-24 22:02:49,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 22:02:49,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:02:49,003 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:49,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:02:49,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:49,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1419667615, now seen corresponding path program 1 times [2023-11-24 22:02:49,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:49,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745825284] [2023-11-24 22:02:49,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:49,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:49,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:49,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745825284] [2023-11-24 22:02:49,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-24 22:02:49,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150214115] [2023-11-24 22:02:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:49,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:49,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:49,144 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:49,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 22:02:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:49,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-24 22:02:49,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 22:02:49,275 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:02:49,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150214115] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:49,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:49,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:02:49,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880203399] [2023-11-24 22:02:49,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:49,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 22:02:49,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:49,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 22:02:49,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 22:02:49,319 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 22:02:49,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:02:49,349 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2023-11-24 22:02:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 22:02:49,352 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-11-24 22:02:49,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:02:49,358 INFO L225 Difference]: With dead ends: 40 [2023-11-24 22:02:49,358 INFO L226 Difference]: Without dead ends: 19 [2023-11-24 22:02:49,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 22:02:49,365 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:02:49,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:02:49,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-24 22:02:49,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-24 22:02:49,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 22:02:49,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-24 22:02:49,412 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 17 [2023-11-24 22:02:49,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:02:49,413 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-24 22:02:49,413 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 22:02:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-24 22:02:49,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 22:02:49,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:02:49,415 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:49,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:49,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-24 22:02:49,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:02:49,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:49,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1758174245, now seen corresponding path program 1 times [2023-11-24 22:02:49,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:49,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762143262] [2023-11-24 22:02:49,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:49,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:49,640 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:02:49,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983400691] [2023-11-24 22:02:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:49,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:49,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:49,643 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:49,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 22:02:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:49,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-24 22:02:49,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 22:02:49,854 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:02:49,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:49,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762143262] [2023-11-24 22:02:49,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:02:49,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983400691] [2023-11-24 22:02:49,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983400691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:49,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:49,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 22:02:49,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389542511] [2023-11-24 22:02:49,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:49,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:02:49,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:49,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:02:49,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:02:49,859 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:02:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:02:49,999 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2023-11-24 22:02:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 22:02:50,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-24 22:02:50,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:02:50,001 INFO L225 Difference]: With dead ends: 30 [2023-11-24 22:02:50,001 INFO L226 Difference]: Without dead ends: 26 [2023-11-24 22:02:50,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-24 22:02:50,008 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:02:50,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 68 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:02:50,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-24 22:02:50,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-24 22:02:50,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-24 22:02:50,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-24 22:02:50,019 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2023-11-24 22:02:50,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:02:50,020 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-24 22:02:50,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:02:50,020 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-24 22:02:50,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 22:02:50,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:02:50,021 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:50,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:50,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:50,228 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:02:50,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:50,229 INFO L85 PathProgramCache]: Analyzing trace with hash -795669560, now seen corresponding path program 1 times [2023-11-24 22:02:50,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:50,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40606129] [2023-11-24 22:02:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:50,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:50,261 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:02:50,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994852471] [2023-11-24 22:02:50,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:50,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:50,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:50,267 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:50,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 22:02:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:50,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 22:02:50,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 22:02:50,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:02:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 22:02:51,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:51,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40606129] [2023-11-24 22:02:51,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:02:51,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994852471] [2023-11-24 22:02:51,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994852471] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 22:02:51,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:02:51,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-11-24 22:02:51,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913541394] [2023-11-24 22:02:51,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:51,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:02:51,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:51,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:02:51,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-24 22:02:51,085 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 22:02:51,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:02:51,155 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2023-11-24 22:02:51,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 22:02:51,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-11-24 22:02:51,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:02:51,159 INFO L225 Difference]: With dead ends: 32 [2023-11-24 22:02:51,159 INFO L226 Difference]: Without dead ends: 28 [2023-11-24 22:02:51,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-24 22:02:51,164 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:02:51,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 57 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:02:51,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-24 22:02:51,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-24 22:02:51,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-24 22:02:51,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-11-24 22:02:51,188 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2023-11-24 22:02:51,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:02:51,188 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-11-24 22:02:51,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 22:02:51,189 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-11-24 22:02:51,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-24 22:02:51,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:02:51,191 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:51,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:51,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:51,394 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:02:51,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:51,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1266135666, now seen corresponding path program 1 times [2023-11-24 22:02:51,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:51,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735234275] [2023-11-24 22:02:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:51,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:51,416 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:02:51,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482707491] [2023-11-24 22:02:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:51,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:51,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:51,423 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:51,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 22:02:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:51,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-24 22:02:51,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 22:02:51,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:02:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 22:02:52,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:52,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735234275] [2023-11-24 22:02:52,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:02:52,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482707491] [2023-11-24 22:02:52,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482707491] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:02:52,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:02:52,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-11-24 22:02:52,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953683365] [2023-11-24 22:02:52,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:02:52,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 22:02:52,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:52,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 22:02:52,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-11-24 22:02:52,226 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 16 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-24 22:02:53,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:02:53,035 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2023-11-24 22:02:53,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 22:02:53,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 35 [2023-11-24 22:02:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:02:53,041 INFO L225 Difference]: With dead ends: 51 [2023-11-24 22:02:53,041 INFO L226 Difference]: Without dead ends: 41 [2023-11-24 22:02:53,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-11-24 22:02:53,048 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:02:53,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 136 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 22:02:53,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-24 22:02:53,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-24 22:02:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 22:02:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2023-11-24 22:02:53,085 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 35 [2023-11-24 22:02:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:02:53,086 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2023-11-24 22:02:53,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-24 22:02:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2023-11-24 22:02:53,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-24 22:02:53,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:02:53,091 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:53,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:53,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:53,298 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:02:53,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:53,298 INFO L85 PathProgramCache]: Analyzing trace with hash 459274687, now seen corresponding path program 2 times [2023-11-24 22:02:53,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:53,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027443342] [2023-11-24 22:02:53,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:53,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:53,329 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:02:53,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262795475] [2023-11-24 22:02:53,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 22:02:53,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:53,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:53,356 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:53,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 22:02:53,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 22:02:53,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:02:53,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 22:02:53,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-24 22:02:53,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:02:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-24 22:02:53,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:53,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027443342] [2023-11-24 22:02:53,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:02:53,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262795475] [2023-11-24 22:02:53,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262795475] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:02:53,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:02:53,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-24 22:02:53,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231063756] [2023-11-24 22:02:53,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:02:53,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 22:02:53,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:53,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 22:02:53,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-24 22:02:53,751 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 12 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2023-11-24 22:02:53,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:02:53,819 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2023-11-24 22:02:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 22:02:53,820 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 12 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) Word has length 56 [2023-11-24 22:02:53,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:02:53,821 INFO L225 Difference]: With dead ends: 43 [2023-11-24 22:02:53,821 INFO L226 Difference]: Without dead ends: 0 [2023-11-24 22:02:53,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2023-11-24 22:02:53,823 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:02:53,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 86 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:02:53,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-24 22:02:53,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-24 22:02:53,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:53,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-24 22:02:53,825 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2023-11-24 22:02:53,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:02:53,825 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-24 22:02:53,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 12 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2023-11-24 22:02:53,826 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-24 22:02:53,826 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-24 22:02:53,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-24 22:02:53,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:54,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:54,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-24 22:02:55,582 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-24 22:02:55,583 INFO L895 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (or (and (= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~c~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 1) (= |ULTIMATE.start_main_~y~0#1| 1)) (and (<= 0 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~c~0#1| 0) (<= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0))) [2023-11-24 22:02:55,583 INFO L899 garLoopResultBuilder]: For program point L29-1(lines 28 37) no Hoare annotation was computed. [2023-11-24 22:02:55,583 INFO L902 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: true [2023-11-24 22:02:55,583 INFO L895 garLoopResultBuilder]: At program point L21-1(line 21) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 1)) [2023-11-24 22:02:55,583 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-24 22:02:55,583 INFO L899 garLoopResultBuilder]: For program point L40(line 40) no Hoare annotation was computed. [2023-11-24 22:02:55,584 INFO L895 garLoopResultBuilder]: At program point L28-2(lines 28 37) the Hoare annotation is: (or (and (= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~c~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 1) (= |ULTIMATE.start_main_~y~0#1| 1)) (and (<= 0 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~c~0#1| 0) (<= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0))) [2023-11-24 22:02:55,584 INFO L895 garLoopResultBuilder]: At program point L28-3(lines 28 37) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (and (= (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~y~0#1|) .cse0) (= (+ (* 6 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 5 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~x~0#1| 12) .cse0)))) [2023-11-24 22:02:55,584 INFO L899 garLoopResultBuilder]: For program point L22(line 22) no Hoare annotation was computed. [2023-11-24 22:02:55,584 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (and (= (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~y~0#1|) .cse0) (= (+ (* 6 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 5 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~x~0#1| 12) .cse0)))) [2023-11-24 22:02:55,585 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 6 8) the Hoare annotation is: true [2023-11-24 22:02:55,585 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2023-11-24 22:02:55,585 INFO L899 garLoopResultBuilder]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2023-11-24 22:02:55,585 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2023-11-24 22:02:55,585 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2023-11-24 22:02:55,585 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2023-11-24 22:02:55,585 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2023-11-24 22:02:55,585 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 15) the Hoare annotation is: true [2023-11-24 22:02:55,585 INFO L899 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2023-11-24 22:02:55,586 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2023-11-24 22:02:55,590 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-11-24 22:02:55,592 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 22:02:55,603 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 10:02:55 BoogieIcfgContainer [2023-11-24 22:02:55,604 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 22:02:55,604 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 22:02:55,605 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 22:02:55,605 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 22:02:55,605 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:02:48" (3/4) ... [2023-11-24 22:02:55,608 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-24 22:02:55,612 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2023-11-24 22:02:55,612 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-11-24 22:02:55,616 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2023-11-24 22:02:55,616 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-24 22:02:55,617 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-24 22:02:55,617 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-24 22:02:55,710 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/witness.graphml [2023-11-24 22:02:55,711 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/witness.yml [2023-11-24 22:02:55,711 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 22:02:55,712 INFO L158 Benchmark]: Toolchain (without parser) took 7558.85ms. Allocated memory was 151.0MB in the beginning and 182.5MB in the end (delta: 31.5MB). Free memory was 117.4MB in the beginning and 144.5MB in the end (delta: -27.0MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. [2023-11-24 22:02:55,712 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 125.8MB. Free memory is still 91.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:02:55,712 INFO L158 Benchmark]: CACSL2BoogieTranslator took 322.95ms. Allocated memory is still 151.0MB. Free memory was 117.0MB in the beginning and 115.0MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-24 22:02:55,713 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.98ms. Allocated memory is still 151.0MB. Free memory was 115.0MB in the beginning and 113.1MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 22:02:55,713 INFO L158 Benchmark]: Boogie Preprocessor took 48.87ms. Allocated memory is still 151.0MB. Free memory was 113.1MB in the beginning and 111.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 22:02:55,713 INFO L158 Benchmark]: RCFGBuilder took 323.62ms. Allocated memory is still 151.0MB. Free memory was 111.1MB in the beginning and 100.3MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 22:02:55,714 INFO L158 Benchmark]: TraceAbstraction took 6700.84ms. Allocated memory was 151.0MB in the beginning and 182.5MB in the end (delta: 31.5MB). Free memory was 99.4MB in the beginning and 149.7MB in the end (delta: -50.3MB). Peak memory consumption was 72.4MB. Max. memory is 16.1GB. [2023-11-24 22:02:55,715 INFO L158 Benchmark]: Witness Printer took 106.57ms. Allocated memory is still 182.5MB. Free memory was 149.7MB in the beginning and 144.5MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-24 22:02:55,718 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 125.8MB. Free memory is still 91.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 322.95ms. Allocated memory is still 151.0MB. Free memory was 117.0MB in the beginning and 115.0MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.98ms. Allocated memory is still 151.0MB. Free memory was 115.0MB in the beginning and 113.1MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.87ms. Allocated memory is still 151.0MB. Free memory was 113.1MB in the beginning and 111.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 323.62ms. Allocated memory is still 151.0MB. Free memory was 111.1MB in the beginning and 100.3MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 6700.84ms. Allocated memory was 151.0MB in the beginning and 182.5MB in the end (delta: 31.5MB). Free memory was 99.4MB in the beginning and 149.7MB in the end (delta: -50.3MB). Peak memory consumption was 72.4MB. Max. memory is 16.1GB. * Witness Printer took 106.57ms. Allocated memory is still 182.5MB. Free memory was 149.7MB in the beginning and 144.5MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. 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 - PositiveResult [Line: 12]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.6s, OverallIterations: 5, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 38 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 35 mSDsluCounter, 369 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 288 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 243 IncrementalHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 81 mSDtfsCounter, 243 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 267 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=4, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 27 PreInvPairs, 40 NumberOfFragments, 152 HoareAnnotationTreeSize, 27 FomulaSimplifications, 377 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 146 FormulaSimplificationTreeSizeReductionInter, 1.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 166 NumberOfCodeBlocks, 166 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 256 ConstructedInterpolants, 0 QuantifiedInterpolants, 1090 SizeOfPredicates, 10 NumberOfNonLiveVariables, 425 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 270/286 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (((((k == 1) && (c == 1)) && (x == 1)) && (y == 1)) || (((((0 <= k) && (c == 0)) && (k <= 1)) && (y == 0)) && (x == 0))) RESULT: Ultimate proved your program to be correct! [2023-11-24 22:02:55,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbcd9942-df5c-4f07-aa00-215b2ed5b929/bin/uautomizer-verify-NlZe1sFDwI/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 Writing output log to file Ultimate.log Result: TRUE