./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.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_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/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_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/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_24c8e4a0-6998-4c4f-8671-7459da19bb56/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 a2e0d3ed79ba62190a0b501c090bc81fd178363cb7e6ce8cbe0996ce655e2ac6 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:49:06,315 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:49:06,378 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:49:06,382 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:49:06,382 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:49:06,405 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:49:06,405 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:49:06,406 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:49:06,406 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:49:06,407 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:49:06,407 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:49:06,408 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:49:06,409 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:49:06,409 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:49:06,410 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:49:06,410 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:49:06,411 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:49:06,411 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:49:06,411 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:49:06,412 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:49:06,412 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:49:06,415 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:49:06,416 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:49:06,416 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:49:06,416 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:49:06,417 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:49:06,417 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:49:06,417 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:49:06,418 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:49:06,418 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:49:06,418 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:49:06,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:49:06,419 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:49:06,419 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:49:06,419 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:49:06,419 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:49:06,420 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:49:06,420 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:49:06,420 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:49:06,420 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:49:06,420 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:49:06,421 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:49:06,421 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_24c8e4a0-6998-4c4f-8671-7459da19bb56/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a2e0d3ed79ba62190a0b501c090bc81fd178363cb7e6ce8cbe0996ce655e2ac6 [2023-11-29 02:49:06,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:49:06,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:49:06,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:49:06,671 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:49:06,671 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:49:06,673 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c [2023-11-29 02:49:09,404 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:49:09,597 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:49:09,598 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c [2023-11-29 02:49:09,606 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/data/da076f747/265e36b9f8814645be3104bc35881aed/FLAG0358d060b [2023-11-29 02:49:09,617 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/data/da076f747/265e36b9f8814645be3104bc35881aed [2023-11-29 02:49:09,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:49:09,621 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:49:09,622 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:49:09,622 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:49:09,628 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:49:09,629 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:49:09" (1/1) ... [2023-11-29 02:49:09,630 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@adbeb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:09, skipping insertion in model container [2023-11-29 02:49:09,630 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:49:09" (1/1) ... [2023-11-29 02:49:09,653 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:49:09,786 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_24c8e4a0-6998-4c4f-8671-7459da19bb56/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c[525,538] [2023-11-29 02:49:09,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:49:09,823 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:49:09,836 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_24c8e4a0-6998-4c4f-8671-7459da19bb56/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c[525,538] [2023-11-29 02:49:09,851 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:49:09,865 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:49:09,866 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:09 WrapperNode [2023-11-29 02:49:09,866 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:49:09,867 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:49:09,867 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:49:09,867 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:49:09,874 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:09" (1/1) ... [2023-11-29 02:49:09,881 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:09" (1/1) ... [2023-11-29 02:49:09,899 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2023-11-29 02:49:09,899 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:49:09,900 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:49:09,900 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:49:09,900 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:49:09,908 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:09" (1/1) ... [2023-11-29 02:49:09,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:09" (1/1) ... [2023-11-29 02:49:09,910 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:09" (1/1) ... [2023-11-29 02:49:09,919 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]. [2023-11-29 02:49:09,920 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:09" (1/1) ... [2023-11-29 02:49:09,920 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:09" (1/1) ... [2023-11-29 02:49:09,923 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:09" (1/1) ... [2023-11-29 02:49:09,926 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:09" (1/1) ... [2023-11-29 02:49:09,927 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:09" (1/1) ... [2023-11-29 02:49:09,928 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:09" (1/1) ... [2023-11-29 02:49:09,929 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:49:09,930 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:49:09,930 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:49:09,930 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:49:09,931 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:09" (1/1) ... [2023-11-29 02:49:09,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:49:09,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:09,960 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:49:09,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:49:09,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:49:09,989 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 02:49:09,989 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 02:49:09,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:49:09,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:49:09,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:49:09,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 02:49:09,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 02:49:10,046 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:49:10,049 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:49:10,244 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:49:10,265 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:49:10,265 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 02:49:10,266 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:49:10 BoogieIcfgContainer [2023-11-29 02:49:10,266 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:49:10,269 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:49:10,269 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:49:10,272 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:49:10,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:49:09" (1/3) ... [2023-11-29 02:49:10,273 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fc6c48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:49:10, skipping insertion in model container [2023-11-29 02:49:10,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:09" (2/3) ... [2023-11-29 02:49:10,274 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fc6c48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:49:10, skipping insertion in model container [2023-11-29 02:49:10,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:49:10" (3/3) ... [2023-11-29 02:49:10,276 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound1.c [2023-11-29 02:49:10,294 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:49:10,295 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:49:10,347 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:49:10,355 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;@301cd50d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:49:10,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:49:10,359 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-29 02:49:10,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 02:49:10,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:49:10,369 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:10,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:49:10,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:10,375 INFO L85 PathProgramCache]: Analyzing trace with hash -10312671, now seen corresponding path program 1 times [2023-11-29 02:49:10,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:10,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528178952] [2023-11-29 02:49:10,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:10,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:10,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:10,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528178952] [2023-11-29 02:49:10,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 02:49:10,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495183031] [2023-11-29 02:49:10,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:10,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:10,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:10,520 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:10,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:49:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:10,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 02:49:10,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:49:10,621 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:49:10,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495183031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:49:10,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:49:10,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:49:10,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024572975] [2023-11-29 02:49:10,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:49:10,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 02:49:10,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:10,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 02:49:10,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:49:10,664 INFO L87 Difference]: Start difference. First operand has 30 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-11-29 02:49:10,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:49:10,693 INFO L93 Difference]: Finished difference Result 58 states and 102 transitions. [2023-11-29 02:49:10,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 02:49:10,696 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 18 [2023-11-29 02:49:10,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:49:10,704 INFO L225 Difference]: With dead ends: 58 [2023-11-29 02:49:10,704 INFO L226 Difference]: Without dead ends: 28 [2023-11-29 02:49:10,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 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 02:49:10,711 INFO L413 NwaCegarLoop]: 39 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, 39 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 02:49:10,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:49:10,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-29 02:49:10,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-29 02:49:10,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 02:49:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2023-11-29 02:49:10,752 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 18 [2023-11-29 02:49:10,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:49:10,753 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2023-11-29 02:49:10,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-11-29 02:49:10,753 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2023-11-29 02:49:10,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 02:49:10,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:49:10,755 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:10,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:49:10,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 02:49:10,961 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:49:10,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:10,961 INFO L85 PathProgramCache]: Analyzing trace with hash 763841584, now seen corresponding path program 1 times [2023-11-29 02:49:10,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:10,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256048345] [2023-11-29 02:49:10,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:10,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:11,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:49:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:11,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:49:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:49:11,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:11,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256048345] [2023-11-29 02:49:11,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256048345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:49:11,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:49:11,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:49:11,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456863170] [2023-11-29 02:49:11,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:49:11,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:49:11,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:11,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:49:11,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:49:11,460 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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), 1 states have call successors, (2) [2023-11-29 02:49:15,584 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 02:49:15,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:49:15,927 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2023-11-29 02:49:15,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:49:15,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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), 1 states have call successors, (2) Word has length 19 [2023-11-29 02:49:15,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:49:15,930 INFO L225 Difference]: With dead ends: 63 [2023-11-29 02:49:15,930 INFO L226 Difference]: Without dead ends: 45 [2023-11-29 02:49:15,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:49:15,932 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:49:15,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 182 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 52 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-11-29 02:49:15,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-29 02:49:15,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2023-11-29 02:49:15,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 02:49:15,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2023-11-29 02:49:15,952 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 19 [2023-11-29 02:49:15,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:49:15,952 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2023-11-29 02:49:15,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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), 1 states have call successors, (2) [2023-11-29 02:49:15,952 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2023-11-29 02:49:15,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 02:49:15,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:49:15,953 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:15,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:49:15,954 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:49:15,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:15,954 INFO L85 PathProgramCache]: Analyzing trace with hash -82339253, now seen corresponding path program 1 times [2023-11-29 02:49:15,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:15,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311680403] [2023-11-29 02:49:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:15,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:16,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:49:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:16,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:49:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:49:16,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:16,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311680403] [2023-11-29 02:49:16,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311680403] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:16,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406716862] [2023-11-29 02:49:16,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:16,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:16,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:16,323 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:16,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:49:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:16,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:49:16,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:49:16,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:49:16,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406716862] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:16,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:16,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 02:49:16,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306376856] [2023-11-29 02:49:16,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:16,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:49:16,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:16,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:49:16,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:49:16,699 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:49:18,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:49:23,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:49:27,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:49:34,676 WARN L539 Checker$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 02:49:36,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:49:41,453 WARN L539 Checker$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 02:49:42,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:49:47,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:49:53,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:49:58,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:50:02,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:50:04,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:50:04,130 INFO L93 Difference]: Finished difference Result 151 states and 246 transitions. [2023-11-29 02:50:04,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 02:50:04,131 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-29 02:50:04,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:50:04,133 INFO L225 Difference]: With dead ends: 151 [2023-11-29 02:50:04,133 INFO L226 Difference]: Without dead ends: 129 [2023-11-29 02:50:04,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2023-11-29 02:50:04,135 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 34 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 127 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:50:04,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 434 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 320 Invalid, 8 Unknown, 0 Unchecked, 47.1s Time] [2023-11-29 02:50:04,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-29 02:50:04,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 68. [2023-11-29 02:50:04,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 41 states have internal predecessors, (47), 26 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-29 02:50:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 97 transitions. [2023-11-29 02:50:04,166 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 97 transitions. Word has length 21 [2023-11-29 02:50:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:50:04,166 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 97 transitions. [2023-11-29 02:50:04,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:50:04,167 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 97 transitions. [2023-11-29 02:50:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 02:50:04,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:50:04,169 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:04,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 02:50:04,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:04,372 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:50:04,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:04,373 INFO L85 PathProgramCache]: Analyzing trace with hash -93184560, now seen corresponding path program 1 times [2023-11-29 02:50:04,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:04,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524602510] [2023-11-29 02:50:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:04,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:04,384 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:50:04,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591313515] [2023-11-29 02:50:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:04,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:04,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:04,386 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:50:04,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:50:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:04,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:50:04,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:50:04,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:50:04,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:50:31,429 WARN L293 SmtUtils]: Spent 5.09s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 02:50:41,939 WARN L876 $PredicateComparison]: unable to prove that (or (= 0 (mod (+ (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 12 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| 4294967280 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 16 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| 4294967284 |c_ULTIMATE.start_main_~q~0#1|) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) (< (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~q~0#1|) 4294967296) (+ (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296) 1)) (< (mod |c_ULTIMATE.start_main_~q~0#1| 4294967296) (+ (mod |c_ULTIMATE.start_main_~n~0#1| 4294967296) 1))) is different from true [2023-11-29 02:50:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:50:44,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:44,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524602510] [2023-11-29 02:50:44,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:50:44,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591313515] [2023-11-29 02:50:44,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591313515] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:50:44,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:50:44,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-29 02:50:44,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761375352] [2023-11-29 02:50:44,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:50:44,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:50:44,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:44,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:50:44,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=99, Unknown=3, NotChecked=20, Total=156 [2023-11-29 02:50:44,746 INFO L87 Difference]: Start difference. First operand 68 states and 97 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 02:50:47,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 02:50:51,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:50:55,490 WARN L539 Checker$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 02:50:59,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:03,603 WARN L539 Checker$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 02:51:05,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:07,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:11,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:20,166 WARN L539 Checker$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 02:51:24,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:26,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:31,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:35,717 WARN L539 Checker$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 02:51:39,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:43,376 WARN L539 Checker$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 02:51:44,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:49,092 WARN L539 Checker$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 02:51:53,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:55,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:59,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:52:03,402 WARN L539 Checker$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 02:52:07,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:52:11,430 WARN L539 Checker$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 02:52:15,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:52:19,469 WARN L539 Checker$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 02:52:25,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:52:29,625 WARN L539 Checker$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 02:52:33,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:52:38,380 WARN L539 Checker$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 02:52:42,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:52:46,397 WARN L539 Checker$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 02:52:50,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:52:52,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:52:56,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:52:56,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:52:56,787 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2023-11-29 02:52:56,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:52:56,788 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29 [2023-11-29 02:52:56,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:52:56,790 INFO L225 Difference]: With dead ends: 85 [2023-11-29 02:52:56,790 INFO L226 Difference]: Without dead ends: 66 [2023-11-29 02:52:56,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=4, NotChecked=24, Total=210 [2023-11-29 02:52:56,791 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 18 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 127.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 127.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:52:56,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 149 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 140 Invalid, 25 Unknown, 68 Unchecked, 127.9s Time] [2023-11-29 02:52:56,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-29 02:52:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-29 02:52:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 36 states have (on average 1.25) internal successors, (45), 39 states have internal predecessors, (45), 25 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-29 02:52:56,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 93 transitions. [2023-11-29 02:52:56,812 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 93 transitions. Word has length 29 [2023-11-29 02:52:56,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:52:56,812 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 93 transitions. [2023-11-29 02:52:56,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 02:52:56,813 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 93 transitions. [2023-11-29 02:52:56,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 02:52:56,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:52:56,814 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:52:56,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:52:57,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:57,015 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:52:57,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:52:57,015 INFO L85 PathProgramCache]: Analyzing trace with hash 471953405, now seen corresponding path program 1 times [2023-11-29 02:52:57,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:52:57,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421935491] [2023-11-29 02:52:57,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:57,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:52:57,023 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:52:57,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640185227] [2023-11-29 02:52:57,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:57,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:57,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:52:57,024 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:52:57,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:52:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:57,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:52:57,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:52:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:52:57,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:52:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:52:57,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:52:57,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421935491] [2023-11-29 02:52:57,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:52:57,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640185227] [2023-11-29 02:52:57,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640185227] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:52:57,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:52:57,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-29 02:52:57,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949834156] [2023-11-29 02:52:57,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:52:57,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:52:57,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:52:57,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:52:57,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:52:57,214 INFO L87 Difference]: Start difference. First operand 66 states and 93 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 02:53:00,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:53:02,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:53:03,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:53:03,054 INFO L93 Difference]: Finished difference Result 89 states and 123 transitions. [2023-11-29 02:53:03,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:53:03,055 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 28 [2023-11-29 02:53:03,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:53:03,056 INFO L225 Difference]: With dead ends: 89 [2023-11-29 02:53:03,056 INFO L226 Difference]: Without dead ends: 57 [2023-11-29 02:53:03,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:53:03,057 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:53:03,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 225 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-11-29 02:53:03,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-29 02:53:03,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2023-11-29 02:53:03,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 28 states have internal predecessors, (28), 24 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-29 02:53:03,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2023-11-29 02:53:03,079 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 28 [2023-11-29 02:53:03,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:53:03,079 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2023-11-29 02:53:03,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 02:53:03,079 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2023-11-29 02:53:03,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 02:53:03,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:53:03,081 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:53:03,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:53:03,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:53:03,282 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:53:03,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:53:03,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2119770422, now seen corresponding path program 1 times [2023-11-29 02:53:03,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:53:03,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896183345] [2023-11-29 02:53:03,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:53:03,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:53:03,293 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:53:03,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362729368] [2023-11-29 02:53:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:53:03,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:53:03,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:53:03,295 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:53:03,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:53:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:53:03,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 02:53:03,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:53:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 02:53:03,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:53:55,099 WARN L293 SmtUtils]: Spent 6.98s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 02:54:04,686 WARN L293 SmtUtils]: Spent 7.39s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 02:55:10,361 WARN L293 SmtUtils]: Spent 23.86s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 02:55:19,003 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 02:55:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 26 proven. 1 refuted. 4 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-29 02:55:20,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:55:20,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896183345] [2023-11-29 02:55:20,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:55:20,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362729368] [2023-11-29 02:55:20,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362729368] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:55:20,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:55:20,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-11-29 02:55:20,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962459502] [2023-11-29 02:55:20,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:55:20,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 02:55:20,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:55:20,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 02:55:20,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=377, Unknown=9, NotChecked=0, Total=462 [2023-11-29 02:55:20,822 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 18 states have internal predecessors, (38), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-29 02:55:24,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 02:55:31,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:55:33,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:55:34,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:55:37,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:55:41,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:55:49,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:55:52,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:56:02,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:56:06,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:56:09,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:56:13,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:56:19,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:56:23,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:56:26,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:56:28,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:56:30,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:56:34,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:56:38,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:56:42,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:56:46,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:56:50,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:56:54,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:56:58,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:57:02,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:57:06,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:57:10,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:57:14,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:57:19,614 WARN L539 Checker$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 02:57:21,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:57:21,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:57:21,750 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2023-11-29 02:57:21,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:57:21,751 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 18 states have internal predecessors, (38), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) Word has length 54 [2023-11-29 02:57:21,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:57:21,752 INFO L225 Difference]: With dead ends: 71 [2023-11-29 02:57:21,752 INFO L226 Difference]: Without dead ends: 52 [2023-11-29 02:57:21,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 99.0s TimeCoverageRelationStatistics Valid=135, Invalid=666, Unknown=11, NotChecked=0, Total=812 [2023-11-29 02:57:21,753 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 32 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 56 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 109.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:57:21,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 290 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 323 Invalid, 18 Unknown, 0 Unchecked, 109.0s Time] [2023-11-29 02:57:21,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-29 02:57:21,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2023-11-29 02:57:21,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 17 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 02:57:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2023-11-29 02:57:21,767 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 54 [2023-11-29 02:57:21,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:57:21,768 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2023-11-29 02:57:21,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 18 states have internal predecessors, (38), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-29 02:57:21,768 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2023-11-29 02:57:21,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 02:57:21,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:57:21,771 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 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 02:57:21,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 02:57:21,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:57:21,971 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:57:21,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:57:21,972 INFO L85 PathProgramCache]: Analyzing trace with hash -665291431, now seen corresponding path program 2 times [2023-11-29 02:57:21,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:57:21,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113818174] [2023-11-29 02:57:21,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:21,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:57:21,982 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:57:21,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939872546] [2023-11-29 02:57:21,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:57:21,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:57:21,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:57:21,984 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:57:21,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:57:22,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:57:22,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:57:22,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 02:57:22,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:57:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 42 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:57:22,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:58:03,410 WARN L293 SmtUtils]: Spent 5.66s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 02:58:08,590 WARN L293 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 02:58:26,281 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~q~0#1| 4294967296))) (let ((.cse1 (div (mod |c_ULTIMATE.start_main_~p~0#1| 4294967296) 2)) (.cse2 (div .cse0 4))) (or (= .cse0 1) (< (mod (+ (* 2 .cse1) (* .cse2 3)) 4294967296) (+ (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* .cse2 4294967295) (* |c_ULTIMATE.start_main_~p~0#1| 4294967295)) 4294967296) 1)) (= (mod (+ (* .cse2 |c_ULTIMATE.start_main_~r~0#1|) (* .cse1 .cse1) (* .cse2 |c_ULTIMATE.start_main_~p~0#1| 4294967295) (* .cse2 2 .cse1)) 4294967296) (mod (* |c_ULTIMATE.start_main_~n~0#1| .cse2) 4294967296)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| 4294967295 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0))))) is different from true [2023-11-29 02:58:34,243 WARN L293 SmtUtils]: Spent 7.62s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 02:58:42,253 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 02:59:04,233 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 02:59:20,037 WARN L293 SmtUtils]: Spent 7.10s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 02:59:26,166 WARN L293 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 02:59:34,180 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 02:59:41,199 WARN L293 SmtUtils]: Spent 7.02s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 02:59:53,645 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 03:00:03,229 WARN L293 SmtUtils]: Spent 5.42s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 03:00:15,974 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 03:00:34,967 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 03:00:39,984 WARN L293 SmtUtils]: Spent 5.02s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 03:00:52,931 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 03:00:58,695 WARN L293 SmtUtils]: Spent 5.76s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 03:01:06,703 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 03:01:14,721 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 03:01:22,846 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~q~0#1| 4294967296))) (let ((.cse1 (div (mod |c_ULTIMATE.start_main_~p~0#1| 4294967296) 2)) (.cse2 (div .cse0 4))) (or (= .cse0 1) (< (mod (+ (* 2 .cse1) (* .cse2 3)) 4294967296) (+ (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* .cse2 4294967295) (* |c_ULTIMATE.start_main_~p~0#1| 4294967295)) 4294967296) 1)) (= (mod (+ (* .cse2 |c_ULTIMATE.start_main_~r~0#1|) (* .cse1 .cse1) (* .cse2 |c_ULTIMATE.start_main_~p~0#1| 4294967295) (* .cse2 2 .cse1)) 4294967296) (mod (* |c_ULTIMATE.start_main_~n~0#1| .cse2) 4294967296)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| 4294967295 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0)) (< .cse0 (+ (mod |c_ULTIMATE.start_main_~n~0#1| 4294967296) 1))))) is different from true [2023-11-29 03:01:30,182 WARN L293 SmtUtils]: Spent 7.33s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 03:01:38,196 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 03:01:46,210 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 03:01:54,222 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 03:02:12,266 WARN L293 SmtUtils]: Spent 7.75s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 03:02:20,767 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (div (mod |c_ULTIMATE.start_main_~p~0#1| 4294967296) 2)) (.cse1 (mod |c_ULTIMATE.start_main_~q~0#1| 1073741824))) (or (< (mod (+ (* 2 .cse0) (* .cse1 3)) 4294967296) (+ (mod (+ (* .cse1 4294967295) |c_ULTIMATE.start_main_~r~0#1| (* |c_ULTIMATE.start_main_~p~0#1| 4294967295)) 4294967296) 1)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| 4294967292 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0)) (= (mod (* |c_ULTIMATE.start_main_~n~0#1| .cse1) 4294967296) (mod (+ (* .cse1 |c_ULTIMATE.start_main_~r~0#1|) (* .cse0 .cse0) (* .cse1 2 .cse0) (* .cse1 |c_ULTIMATE.start_main_~p~0#1| 4294967295)) 4294967296)) (< (* .cse1 4) (+ (mod |c_ULTIMATE.start_main_~n~0#1| 4294967296) 1)))) is different from true [2023-11-29 03:02:30,488 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 03:02:38,506 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 03:02:44,027 WARN L293 SmtUtils]: Spent 5.52s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 03:02:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 5 not checked. [2023-11-29 03:02:44,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:02:44,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113818174] [2023-11-29 03:02:44,050 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:02:44,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939872546] [2023-11-29 03:02:44,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939872546] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:02:44,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:02:44,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2023-11-29 03:02:44,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969862743] [2023-11-29 03:02:44,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:02:44,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 03:02:44,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:02:44,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 03:02:44,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=316, Unknown=4, NotChecked=114, Total=506 [2023-11-29 03:02:44,053 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 23 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 18 states have internal predecessors, (38), 8 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2023-11-29 03:02:49,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:02:50,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:02:55,571 WARN L539 Checker$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 03:02:57,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:03:01,850 WARN L539 Checker$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 03:03:11,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:03:16,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:03:21,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:03:23,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:03:26,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:03:27,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:03:27,061 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2023-11-29 03:03:27,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 03:03:27,062 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 18 states have internal predecessors, (38), 8 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 59 [2023-11-29 03:03:27,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:03:27,063 INFO L225 Difference]: With dead ends: 58 [2023-11-29 03:03:27,063 INFO L226 Difference]: Without dead ends: 56 [2023-11-29 03:03:27,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=100, Invalid=460, Unknown=4, NotChecked=138, Total=702 [2023-11-29 03:03:27,064 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 41 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 37.9s IncrementalHoareTripleChecker+Time [2023-11-29 03:03:27,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 272 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 309 Invalid, 4 Unknown, 160 Unchecked, 37.9s Time] [2023-11-29 03:03:27,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-29 03:03:27,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2023-11-29 03:03:27,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 03:03:27,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2023-11-29 03:03:27,080 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 59 [2023-11-29 03:03:27,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:03:27,080 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2023-11-29 03:03:27,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 18 states have internal predecessors, (38), 8 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2023-11-29 03:03:27,081 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2023-11-29 03:03:27,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-29 03:03:27,082 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:03:27,082 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:03:27,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 03:03:27,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:03:27,283 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:03:27,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:03:27,283 INFO L85 PathProgramCache]: Analyzing trace with hash -212420630, now seen corresponding path program 3 times [2023-11-29 03:03:27,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:03:27,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121122817] [2023-11-29 03:03:27,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:03:27,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:03:27,291 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:03:27,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512662342] [2023-11-29 03:03:27,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:03:27,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:03:27,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:03:27,293 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:03:27,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24c8e4a0-6998-4c4f-8671-7459da19bb56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 03:03:27,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 03:03:27,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:03:27,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 03:03:27,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:03:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-11-29 03:03:27,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:04:02,911 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~q~0#1| 4294967296))) (or (= .cse0 1) (= (mod (let ((.cse2 (div (mod |c_ULTIMATE.start_main_~p~0#1| 4294967296) 2)) (.cse1 (div .cse0 4))) (+ (* |c_ULTIMATE.start_main_~n~0#1| .cse1 .cse1 4) (* .cse1 .cse1 12 .cse2) (* .cse1 .cse1 4294967290 |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| .cse1 16 .cse2) (* .cse1 |c_ULTIMATE.start_main_~p~0#1| 16 .cse2) (* .cse1 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| 12) (* .cse1 |c_ULTIMATE.start_main_~r~0#1| .cse2 4294967280) (* |c_ULTIMATE.start_main_~n~0#1| .cse1 |c_ULTIMATE.start_main_~p~0#1| 4294967284) (* 4294967292 .cse1 .cse1 |c_ULTIMATE.start_main_~r~0#1|) (* .cse1 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1| 4294967287))) 4294967296) 0))) is different from true [2023-11-29 03:04:15,893 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)