./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/divbin2.i --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_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/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_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/divbin2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/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_963b0048-8248-4a6d-8a18-ab90d2738a56/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 c7e3f11d23b462949b18ec2057853f57240b0651aa6fb66cf591585739df9d3e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:16:14,467 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:16:14,532 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:16:14,537 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:16:14,537 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:16:14,561 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:16:14,561 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:16:14,562 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:16:14,563 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:16:14,563 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:16:14,564 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:16:14,564 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:16:14,565 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:16:14,565 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:16:14,566 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:16:14,566 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:16:14,567 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:16:14,567 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:16:14,568 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:16:14,568 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:16:14,569 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:16:14,571 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:16:14,572 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:16:14,572 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:16:14,573 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:16:14,573 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:16:14,573 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:16:14,574 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:16:14,574 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:16:14,574 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:16:14,575 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:16:14,575 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:16:14,575 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:16:14,576 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:16:14,576 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:16:14,576 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:16:14,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:16:14,576 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:16:14,577 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:16:14,577 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:16:14,577 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:16:14,577 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:16:14,578 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_963b0048-8248-4a6d-8a18-ab90d2738a56/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e3f11d23b462949b18ec2057853f57240b0651aa6fb66cf591585739df9d3e [2023-11-29 00:16:14,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:16:14,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:16:14,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:16:14,816 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:16:14,816 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:16:14,817 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/nla-digbench/divbin2.i [2023-11-29 00:16:17,618 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:16:17,779 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:16:17,779 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/sv-benchmarks/c/nla-digbench/divbin2.i [2023-11-29 00:16:17,785 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/data/7e2c9b0fb/7bab5abb49224375b29c4b65d73adda8/FLAG924d6102f [2023-11-29 00:16:17,800 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/data/7e2c9b0fb/7bab5abb49224375b29c4b65d73adda8 [2023-11-29 00:16:17,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:16:17,804 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:16:17,806 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:16:17,806 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:16:17,811 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:16:17,812 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:16:17" (1/1) ... [2023-11-29 00:16:17,813 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cdb9d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:16:17, skipping insertion in model container [2023-11-29 00:16:17,813 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:16:17" (1/1) ... [2023-11-29 00:16:17,835 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:16:17,991 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_963b0048-8248-4a6d-8a18-ab90d2738a56/sv-benchmarks/c/nla-digbench/divbin2.i[951,964] [2023-11-29 00:16:18,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:16:18,013 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:16:18,026 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_963b0048-8248-4a6d-8a18-ab90d2738a56/sv-benchmarks/c/nla-digbench/divbin2.i[951,964] [2023-11-29 00:16:18,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:16:18,046 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:16:18,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:16:18 WrapperNode [2023-11-29 00:16:18,046 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:16:18,047 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:16:18,048 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:16:18,048 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:16:18,055 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:16:18" (1/1) ... [2023-11-29 00:16:18,061 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:16:18" (1/1) ... [2023-11-29 00:16:18,076 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-11-29 00:16:18,076 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:16:18,077 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:16:18,077 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:16:18,077 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:16:18,085 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:16:18" (1/1) ... [2023-11-29 00:16:18,085 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:16:18" (1/1) ... [2023-11-29 00:16:18,086 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:16:18" (1/1) ... [2023-11-29 00:16:18,094 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 00:16:18,094 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:16:18" (1/1) ... [2023-11-29 00:16:18,094 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:16:18" (1/1) ... [2023-11-29 00:16:18,096 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:16:18" (1/1) ... [2023-11-29 00:16:18,100 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:16:18" (1/1) ... [2023-11-29 00:16:18,100 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:16:18" (1/1) ... [2023-11-29 00:16:18,101 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:16:18" (1/1) ... [2023-11-29 00:16:18,102 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:16:18,103 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:16:18,103 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:16:18,103 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:16:18,104 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:16:18" (1/1) ... [2023-11-29 00:16:18,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:16:18,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:16:18,129 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:16:18,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:16:18,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:16:18,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:16:18,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:16:18,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:16:18,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 00:16:18,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 00:16:18,209 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:16:18,211 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:16:18,316 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:16:18,338 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:16:18,339 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 00:16:18,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:16:18 BoogieIcfgContainer [2023-11-29 00:16:18,339 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:16:18,342 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:16:18,342 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:16:18,345 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:16:18,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:16:17" (1/3) ... [2023-11-29 00:16:18,345 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccce79b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:16:18, skipping insertion in model container [2023-11-29 00:16:18,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:16:18" (2/3) ... [2023-11-29 00:16:18,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccce79b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:16:18, skipping insertion in model container [2023-11-29 00:16:18,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:16:18" (3/3) ... [2023-11-29 00:16:18,347 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2.i [2023-11-29 00:16:18,363 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:16:18,363 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:16:18,405 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:16:18,411 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;@3463491a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:16:18,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:16:18,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 00:16:18,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 00:16:18,421 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:16:18,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:18,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:16:18,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:18,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1046218469, now seen corresponding path program 1 times [2023-11-29 00:16:18,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:18,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652886649] [2023-11-29 00:16:18,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:18,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:18,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:18,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652886649] [2023-11-29 00:16:18,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 00:16:18,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719859082] [2023-11-29 00:16:18,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:18,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:18,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:16:18,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:16:18,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:16:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:18,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 00:16:18,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:16:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:18,604 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:16:18,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719859082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:18,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:18,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:16:18,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502950611] [2023-11-29 00:16:18,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:18,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:16:18,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:18,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:16:18,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:16:18,643 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:18,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:16:18,663 INFO L93 Difference]: Finished difference Result 29 states and 44 transitions. [2023-11-29 00:16:18,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:16:18,665 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-29 00:16:18,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:16:18,671 INFO L225 Difference]: With dead ends: 29 [2023-11-29 00:16:18,671 INFO L226 Difference]: Without dead ends: 14 [2023-11-29 00:16:18,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:16:18,677 INFO L413 NwaCegarLoop]: 17 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, 17 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 00:16:18,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:16:18,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-29 00:16:18,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-29 00:16:18,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 00:16:18,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-11-29 00:16:18,709 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 7 [2023-11-29 00:16:18,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:16:18,710 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-11-29 00:16:18,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:18,710 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-11-29 00:16:18,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 00:16:18,711 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:16:18,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:18,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:16:18,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 00:16:18,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:16:18,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:18,917 INFO L85 PathProgramCache]: Analyzing trace with hash -336588208, now seen corresponding path program 1 times [2023-11-29 00:16:18,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:18,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225123254] [2023-11-29 00:16:18,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:18,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:18,935 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:16:18,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092464214] [2023-11-29 00:16:18,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:18,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:18,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:16:18,937 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:16:18,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:16:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:18,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 00:16:18,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:16:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:19,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:16:19,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:19,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225123254] [2023-11-29 00:16:19,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:16:19,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092464214] [2023-11-29 00:16:19,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092464214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:19,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:19,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:16:19,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992133560] [2023-11-29 00:16:19,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:19,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:16:19,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:19,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:16:19,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:16:19,129 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:19,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:16:19,193 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-11-29 00:16:19,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:16:19,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-29 00:16:19,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:16:19,195 INFO L225 Difference]: With dead ends: 26 [2023-11-29 00:16:19,195 INFO L226 Difference]: Without dead ends: 23 [2023-11-29 00:16:19,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:16:19,197 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:16:19,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:16:19,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-29 00:16:19,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-29 00:16:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 00:16:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-29 00:16:19,206 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 8 [2023-11-29 00:16:19,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:16:19,206 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-29 00:16:19,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:19,207 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-29 00:16:19,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 00:16:19,208 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:16:19,208 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:19,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:16:19,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 00:16:19,408 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:16:19,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:19,409 INFO L85 PathProgramCache]: Analyzing trace with hash -475727605, now seen corresponding path program 1 times [2023-11-29 00:16:19,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:19,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629930103] [2023-11-29 00:16:19,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:19,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:19,418 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:16:19,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471540806] [2023-11-29 00:16:19,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:19,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:19,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:16:19,420 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:16:19,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:16:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:19,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:16:19,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:16:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:16:19,535 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:16:19,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:19,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629930103] [2023-11-29 00:16:19,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:16:19,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471540806] [2023-11-29 00:16:19,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471540806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:19,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:19,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:16:19,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652018836] [2023-11-29 00:16:19,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:19,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:16:19,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:19,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:16:19,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:16:19,539 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:19,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:16:19,588 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-11-29 00:16:19,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:16:19,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 00:16:19,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:16:19,589 INFO L225 Difference]: With dead ends: 34 [2023-11-29 00:16:19,589 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 00:16:19,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:16:19,591 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:16:19,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:16:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 00:16:19,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2023-11-29 00:16:19,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 00:16:19,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-29 00:16:19,599 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 10 [2023-11-29 00:16:19,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:16:19,599 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-29 00:16:19,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:19,600 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-29 00:16:19,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 00:16:19,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:16:19,601 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:19,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:16:19,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:19,803 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:16:19,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:19,804 INFO L85 PathProgramCache]: Analyzing trace with hash 895535107, now seen corresponding path program 1 times [2023-11-29 00:16:19,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:19,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498098289] [2023-11-29 00:16:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:19,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:19,815 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:16:19,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481808872] [2023-11-29 00:16:19,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:19,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:19,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:16:19,817 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:16:19,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:16:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:19,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:16:19,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:16:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:19,895 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:16:19,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:19,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498098289] [2023-11-29 00:16:19,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:16:19,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481808872] [2023-11-29 00:16:19,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481808872] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:19,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:19,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:16:19,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156898888] [2023-11-29 00:16:19,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:19,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:16:19,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:19,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:16:19,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:16:19,899 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 00:16:19,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:16:19,920 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2023-11-29 00:16:19,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:16:19,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-29 00:16:19,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:16:19,921 INFO L225 Difference]: With dead ends: 46 [2023-11-29 00:16:19,921 INFO L226 Difference]: Without dead ends: 24 [2023-11-29 00:16:19,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:16:19,923 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:16:19,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:16:19,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-29 00:16:19,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-29 00:16:19,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 00:16:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-29 00:16:19,930 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2023-11-29 00:16:19,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:16:19,930 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-29 00:16:19,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 00:16:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-29 00:16:19,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 00:16:19,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:16:19,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:19,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 00:16:20,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:20,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:16:20,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:20,133 INFO L85 PathProgramCache]: Analyzing trace with hash 46973886, now seen corresponding path program 1 times [2023-11-29 00:16:20,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:20,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97038551] [2023-11-29 00:16:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:20,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:20,141 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:16:20,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550687126] [2023-11-29 00:16:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:20,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:20,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:16:20,143 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:16:20,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:16:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:20,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 00:16:20,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:16:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:20,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:16:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:25,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:25,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97038551] [2023-11-29 00:16:25,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:16:25,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550687126] [2023-11-29 00:16:25,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550687126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:16:25,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:16:25,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-29 00:16:25,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035224684] [2023-11-29 00:16:25,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:16:25,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:16:25,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:25,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:16:25,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=181, Unknown=1, NotChecked=0, Total=240 [2023-11-29 00:16:25,901 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 00:16:33,220 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 00:16:44,195 WARN L293 SmtUtils]: Spent 10.15s 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 00:16:56,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:17:01,084 WARN L539 Checker$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 00:17:04,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:17:09,470 WARN L539 Checker$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 00:17:13,505 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 00:17:13,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:17:13,516 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2023-11-29 00:17:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 00:17:13,517 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-29 00:17:13,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:17:13,518 INFO L225 Difference]: With dead ends: 86 [2023-11-29 00:17:13,518 INFO L226 Difference]: Without dead ends: 65 [2023-11-29 00:17:13,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=107, Invalid=312, Unknown=1, NotChecked=0, Total=420 [2023-11-29 00:17:13,520 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 27 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:17:13,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 90 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 135 Invalid, 5 Unknown, 0 Unchecked, 28.6s Time] [2023-11-29 00:17:13,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-29 00:17:13,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2023-11-29 00:17:13,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 47 states have internal predecessors, (57), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 00:17:13,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2023-11-29 00:17:13,541 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 18 [2023-11-29 00:17:13,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:17:13,541 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2023-11-29 00:17:13,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 00:17:13,542 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2023-11-29 00:17:13,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 00:17:13,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:17:13,543 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:17:13,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:17:13,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:13,744 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:17:13,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:13,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1373333103, now seen corresponding path program 2 times [2023-11-29 00:17:13,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:13,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035221525] [2023-11-29 00:17:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:13,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:17:13,755 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:17:13,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041154277] [2023-11-29 00:17:13,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:17:13,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:13,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:17:13,757 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:17:13,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:17:13,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:17:13,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:17:13,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 00:17:13,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:17:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:17:14,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:17:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:17:31,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:17:31,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035221525] [2023-11-29 00:17:31,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:17:31,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041154277] [2023-11-29 00:17:31,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041154277] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:17:31,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:17:31,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2023-11-29 00:17:31,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323436872] [2023-11-29 00:17:31,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:17:31,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 00:17:31,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:31,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 00:17:31,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=319, Unknown=1, NotChecked=0, Total=420 [2023-11-29 00:17:31,687 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 19 states have internal predecessors, (38), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 00:18:41,606 WARN L293 SmtUtils]: Spent 1.06m on a formula simplification that was a NOOP. DAG size: 64 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:18:46,030 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 00:18:50,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:18:54,042 WARN L539 Checker$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 00:19:00,801 WARN L293 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:19:21,705 WARN L293 SmtUtils]: Spent 12.18s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:19:54,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:19:58,032 WARN L539 Checker$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 00:20:00,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:20:03,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:20:07,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:20:11,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:20:15,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:20:19,943 WARN L539 Checker$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 00:20:21,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:20:29,785 WARN L293 SmtUtils]: Spent 5.96s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:20:32,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:20:43,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:20:47,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:20:51,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:20:55,106 WARN L539 Checker$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 00:20:59,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:21:03,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:21:05,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:21:09,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:21:10,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:21:14,659 WARN L539 Checker$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 00:21:19,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:21:23,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:21:25,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:21:26,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:21:29,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:21:30,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:21:34,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:21:36,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:21:38,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:21:41,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:22:35,229 WARN L293 SmtUtils]: Spent 49.39s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:22:37,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:22:41,745 WARN L539 Checker$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 00:22:43,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:22:47,652 WARN L539 Checker$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 00:22:50,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:22:51,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:51,667 INFO L93 Difference]: Finished difference Result 165 states and 217 transitions. [2023-11-29 00:22:51,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 00:22:51,672 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 19 states have internal predecessors, (38), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-11-29 00:22:51,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:51,674 INFO L225 Difference]: With dead ends: 165 [2023-11-29 00:22:51,674 INFO L226 Difference]: Without dead ends: 141 [2023-11-29 00:22:51,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 196.9s TimeCoverageRelationStatistics Valid=267, Invalid=721, Unknown=4, NotChecked=0, Total=992 [2023-11-29 00:22:51,676 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 78 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 51 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 135.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:51,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 272 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 437 Invalid, 20 Unknown, 0 Unchecked, 135.3s Time] [2023-11-29 00:22:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-29 00:22:51,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2023-11-29 00:22:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 93 states have (on average 1.2688172043010753) internal successors, (118), 98 states have internal predecessors, (118), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-29 00:22:51,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 157 transitions. [2023-11-29 00:22:51,725 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 157 transitions. Word has length 24 [2023-11-29 00:22:51,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:51,725 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 157 transitions. [2023-11-29 00:22:51,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 19 states have internal predecessors, (38), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 00:22:51,725 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 157 transitions. [2023-11-29 00:22:51,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 00:22:51,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:51,727 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-29 00:22:51,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:22:51,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 00:22:51,928 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:51,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:51,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1234949263, now seen corresponding path program 3 times [2023-11-29 00:22:51,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:51,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657168695] [2023-11-29 00:22:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:51,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:51,939 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:51,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436108405] [2023-11-29 00:22:51,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:22:51,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:51,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:51,940 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:51,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:24:12,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:24:12,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:24:12,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:24:12,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:13,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:13,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:13,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657168695] [2023-11-29 00:24:13,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:24:13,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436108405] [2023-11-29 00:24:13,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436108405] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:24:13,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:24:13,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2023-11-29 00:24:13,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565672072] [2023-11-29 00:24:13,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:24:13,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 00:24:13,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:13,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 00:24:13,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:24:13,331 INFO L87 Difference]: Start difference. First operand 121 states and 157 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 00:24:13,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:24:13,561 INFO L93 Difference]: Finished difference Result 142 states and 184 transitions. [2023-11-29 00:24:13,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:24:13,562 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2023-11-29 00:24:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:24:13,565 INFO L225 Difference]: With dead ends: 142 [2023-11-29 00:24:13,565 INFO L226 Difference]: Without dead ends: 112 [2023-11-29 00:24:13,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:24:13,567 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:24:13,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 72 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:24:13,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-29 00:24:13,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2023-11-29 00:24:13,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 80 states have (on average 1.2625) internal successors, (101), 84 states have internal predecessors, (101), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 00:24:13,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2023-11-29 00:24:13,617 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 26 [2023-11-29 00:24:13,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:24:13,618 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2023-11-29 00:24:13,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 00:24:13,618 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2023-11-29 00:24:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 00:24:13,620 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:24:13,620 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-29 00:24:13,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:24:13,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 00:24:13,824 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:24:13,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:24:13,824 INFO L85 PathProgramCache]: Analyzing trace with hash -114511139, now seen corresponding path program 4 times [2023-11-29 00:24:13,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:24:13,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30959463] [2023-11-29 00:24:13,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:13,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:24:13,835 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:24:13,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457236379] [2023-11-29 00:24:13,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:24:13,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:13,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:24:13,836 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:24:13,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963b0048-8248-4a6d-8a18-ab90d2738a56/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:24:14,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:24:14,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:24:14,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 00:24:14,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:24:14,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:01,005 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 00:25:13,081 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:25:17,089 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824)) (.cse2 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (= .cse0 (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* .cse1 4 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) (< .cse2 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~b~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse0)) (< (* .cse1 4) (+ .cse2 1)))) is different from true [2023-11-29 00:25:29,234 WARN L293 SmtUtils]: Spent 8.01s 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 00:25:37,249 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:25:45,269 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:25:53,293 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 00:26:05,353 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:26:10,626 WARN L293 SmtUtils]: Spent 5.27s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:26:14,639 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse0 (mod |c_ULTIMATE.start_main_~b~0#1| 536870912)) (.cse1 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (< (* 8 .cse0) (+ .cse1 1)) (not (= .cse2 (mod (+ (* 8 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296))) (= .cse2 (mod (+ (* 8 .cse0 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296)) (< .cse1 (* 2 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648))))) is different from true [2023-11-29 00:26:22,668 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 00:26:34,781 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:26:55,775 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 00:27:03,806 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:27:07,814 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~b~0#1| 268435456)) (.cse2 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296))) (or (= (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* .cse0 16 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) .cse1) (< .cse2 (* (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824) 4)) (< (* .cse0 16) (+ .cse2 1)) (not (= .cse1 (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* 16 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296))))) is different from true [2023-11-29 00:27:19,846 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:27:27,862 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 00:27:35,883 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:27:43,913 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:27:56,090 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 00:28:04,148 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~b~0#1| 134217728)) (.cse2 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296))) (or (= (mod (+ (* .cse0 32 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse1) (< .cse2 (* 8 (mod |c_ULTIMATE.start_main_~b~0#1| 536870912))) (< (* .cse0 32) (+ .cse2 1)) (not (= (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* 32 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) .cse1)))) is different from true [2023-11-29 00:28:12,167 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:28:24,462 WARN L293 SmtUtils]: Spent 8.14s 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 00:28:31,535 WARN L293 SmtUtils]: Spent 7.07s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:28:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 28 not checked. [2023-11-29 00:28:31,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:28:31,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30959463] [2023-11-29 00:28:31,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:28:31,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457236379] [2023-11-29 00:28:31,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457236379] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:28:31,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:28:31,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2023-11-29 00:28:31,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750939095] [2023-11-29 00:28:31,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:28:31,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 00:28:31,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:28:31,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 00:28:31,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=522, Unknown=5, NotChecked=204, Total=870 [2023-11-29 00:28:31,539 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 28 states have internal predecessors, (53), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 00:28:35,954 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 00:29:15,859 WARN L293 SmtUtils]: Spent 32.46s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:29:20,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:29:23,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:29:27,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:29:29,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:30:11,573 WARN L293 SmtUtils]: Spent 31.11s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:30:16,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:30:23,134 WARN L539 Checker$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 00:30:24,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:30:26,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:30:30,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:30:34,411 WARN L539 Checker$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 00:30:49,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:30:50,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:30:54,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:30:59,504 WARN L539 Checker$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 00:31:12,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:31:16,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:31:31,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:31:35,487 WARN L539 Checker$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 00:31:39,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:31:40,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []