./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init4_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init4_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7de2214854a04c901d9978fa289dade6eeec8633c1136ab59a064791b6d02f7f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:00:19,246 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:00:19,406 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 22:00:19,411 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:00:19,412 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:00:19,452 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:00:19,453 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:00:19,454 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:00:19,455 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:00:19,455 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:00:19,456 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:00:19,457 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:00:19,458 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:00:19,458 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:00:19,459 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:00:19,460 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:00:19,461 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 22:00:19,461 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:00:19,462 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:00:19,463 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:00:19,463 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:00:19,464 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 22:00:19,465 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:00:19,465 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 22:00:19,466 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:00:19,467 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 22:00:19,467 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:00:19,468 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:00:19,468 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:00:19,469 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:00:19,469 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:00:19,470 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:00:19,471 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:00:19,471 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:00:19,471 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 22:00:19,472 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:00:19,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:00:19,473 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:00:19,473 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:00:19,474 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 22:00:19,474 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:00:19,478 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:00:19,478 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_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7de2214854a04c901d9978fa289dade6eeec8633c1136ab59a064791b6d02f7f [2023-11-24 22:00:19,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:00:19,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:00:19,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:00:19,948 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:00:19,948 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:00:19,950 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/array-examples/standard_init4_ground-2.i [2023-11-24 22:00:23,138 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:00:23,452 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:00:23,454 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/sv-benchmarks/c/array-examples/standard_init4_ground-2.i [2023-11-24 22:00:23,463 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/data/193644472/d5c780eb675843108d37467efd63976b/FLAG9e9550fa1 [2023-11-24 22:00:23,754 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/data/193644472/d5c780eb675843108d37467efd63976b [2023-11-24 22:00:23,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:00:23,761 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:00:23,764 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:00:23,765 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:00:23,774 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:00:23,774 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:00:23" (1/1) ... [2023-11-24 22:00:23,776 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@164b9c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:23, skipping insertion in model container [2023-11-24 22:00:23,776 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:00:23" (1/1) ... [2023-11-24 22:00:23,798 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:00:23,946 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_45eed81c-534f-4d14-88e7-646947e9e283/sv-benchmarks/c/array-examples/standard_init4_ground-2.i[816,829] [2023-11-24 22:00:23,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:00:23,972 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:00:23,987 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_45eed81c-534f-4d14-88e7-646947e9e283/sv-benchmarks/c/array-examples/standard_init4_ground-2.i[816,829] [2023-11-24 22:00:23,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:00:24,011 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:00:24,011 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:24 WrapperNode [2023-11-24 22:00:24,011 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:00:24,013 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:00:24,013 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:00:24,013 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:00:24,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:24" (1/1) ... [2023-11-24 22:00:24,031 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:24" (1/1) ... [2023-11-24 22:00:24,058 INFO L138 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2023-11-24 22:00:24,058 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:00:24,059 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:00:24,059 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:00:24,060 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:00:24,072 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:24" (1/1) ... [2023-11-24 22:00:24,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:24" (1/1) ... [2023-11-24 22:00:24,084 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:24" (1/1) ... [2023-11-24 22:00:24,110 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2023-11-24 22:00:24,110 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:24" (1/1) ... [2023-11-24 22:00:24,111 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:24" (1/1) ... [2023-11-24 22:00:24,128 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:24" (1/1) ... [2023-11-24 22:00:24,132 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:24" (1/1) ... [2023-11-24 22:00:24,135 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:24" (1/1) ... [2023-11-24 22:00:24,137 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:24" (1/1) ... [2023-11-24 22:00:24,141 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:00:24,142 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:00:24,143 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:00:24,143 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:00:24,144 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:24" (1/1) ... [2023-11-24 22:00:24,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:00:24,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:24,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:00:24,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:00:24,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:00:24,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:00:24,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 22:00:24,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:00:24,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 22:00:24,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 22:00:24,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:00:24,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:00:24,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 22:00:24,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 22:00:24,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:00:24,326 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:00:24,329 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:00:24,535 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:00:24,561 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:00:24,562 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-24 22:00:24,562 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:00:24 BoogieIcfgContainer [2023-11-24 22:00:24,562 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:00:24,565 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:00:24,565 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:00:24,569 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:00:24,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:00:23" (1/3) ... [2023-11-24 22:00:24,570 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5895424b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:00:24, skipping insertion in model container [2023-11-24 22:00:24,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:24" (2/3) ... [2023-11-24 22:00:24,570 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5895424b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:00:24, skipping insertion in model container [2023-11-24 22:00:24,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:00:24" (3/3) ... [2023-11-24 22:00:24,572 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-2.i [2023-11-24 22:00:24,589 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:00:24,589 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 22:00:24,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:00:24,642 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;@2476339e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:00:24,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 22:00:24,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:24,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 22:00:24,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:24,662 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:24,662 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:24,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:24,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1742425898, now seen corresponding path program 1 times [2023-11-24 22:00:24,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:24,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313929934] [2023-11-24 22:00:24,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:24,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:00:24,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:24,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313929934] [2023-11-24 22:00:24,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313929934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:24,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:24,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:00:24,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416595958] [2023-11-24 22:00:24,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:24,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:00:24,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:24,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:00:24,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:00:24,936 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:25,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:25,036 INFO L93 Difference]: Finished difference Result 34 states and 60 transitions. [2023-11-24 22:00:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:00:25,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 22:00:25,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:25,048 INFO L225 Difference]: With dead ends: 34 [2023-11-24 22:00:25,048 INFO L226 Difference]: Without dead ends: 18 [2023-11-24 22:00:25,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:00:25,055 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:25,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:00:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-24 22:00:25,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-24 22:00:25,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-24 22:00:25,100 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2023-11-24 22:00:25,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:25,101 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-24 22:00:25,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-24 22:00:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 22:00:25,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:25,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:25,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:00:25,103 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:25,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash -389025196, now seen corresponding path program 1 times [2023-11-24 22:00:25,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:25,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080902488] [2023-11-24 22:00:25,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:25,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:00:25,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:25,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080902488] [2023-11-24 22:00:25,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080902488] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:25,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517821296] [2023-11-24 22:00:25,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:25,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:25,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:25,345 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:25,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 22:00:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:25,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:00:25,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:00:25,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:00:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:00:25,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517821296] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:00:25,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:00:25,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-24 22:00:25,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875786690] [2023-11-24 22:00:25,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:00:25,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:00:25,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:25,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:00:25,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:00:25,588 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:25,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:25,688 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2023-11-24 22:00:25,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 22:00:25,689 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-24 22:00:25,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:25,690 INFO L225 Difference]: With dead ends: 45 [2023-11-24 22:00:25,690 INFO L226 Difference]: Without dead ends: 30 [2023-11-24 22:00:25,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:00:25,693 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:25,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:00:25,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-24 22:00:25,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-24 22:00:25,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:25,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-11-24 22:00:25,703 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 16 [2023-11-24 22:00:25,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:25,704 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-11-24 22:00:25,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:25,704 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-11-24 22:00:25,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-24 22:00:25,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:25,706 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:25,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 22:00:25,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-24 22:00:25,913 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:25,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:25,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1675605930, now seen corresponding path program 2 times [2023-11-24 22:00:25,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:25,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806849854] [2023-11-24 22:00:25,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:25,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-24 22:00:26,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:26,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806849854] [2023-11-24 22:00:26,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806849854] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:26,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843648216] [2023-11-24 22:00:26,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 22:00:26,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:26,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:26,340 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:26,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 22:00:26,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 22:00:26,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:00:26,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 22:00:26,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-24 22:00:26,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:00:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-24 22:00:26,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843648216] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:00:26,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:00:26,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-24 22:00:26,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451889766] [2023-11-24 22:00:26,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:00:26,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 22:00:26,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:26,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 22:00:26,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-24 22:00:26,672 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:26,889 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2023-11-24 22:00:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 22:00:26,890 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-24 22:00:26,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:26,893 INFO L225 Difference]: With dead ends: 78 [2023-11-24 22:00:26,894 INFO L226 Difference]: Without dead ends: 54 [2023-11-24 22:00:26,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-24 22:00:26,900 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:26,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:00:26,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-24 22:00:26,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-24 22:00:26,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:26,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-11-24 22:00:26,955 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 28 [2023-11-24 22:00:26,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:26,955 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-11-24 22:00:26,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:26,956 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-11-24 22:00:26,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-24 22:00:26,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:26,958 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:26,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 22:00:27,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:27,164 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:27,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:27,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1209512854, now seen corresponding path program 3 times [2023-11-24 22:00:27,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:27,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172843134] [2023-11-24 22:00:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:27,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-24 22:00:27,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:27,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172843134] [2023-11-24 22:00:27,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172843134] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:27,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595850693] [2023-11-24 22:00:27,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 22:00:27,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:27,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:27,704 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:27,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 22:00:30,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-24 22:00:30,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:00:30,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 22:00:30,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-24 22:00:30,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:00:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-24 22:00:31,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595850693] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:00:31,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:00:31,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 25 [2023-11-24 22:00:31,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353780498] [2023-11-24 22:00:31,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:00:31,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 22:00:31,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:31,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 22:00:31,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-24 22:00:31,127 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:31,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:31,488 INFO L93 Difference]: Finished difference Result 144 states and 199 transitions. [2023-11-24 22:00:31,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-24 22:00:31,489 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-24 22:00:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:31,491 INFO L225 Difference]: With dead ends: 144 [2023-11-24 22:00:31,491 INFO L226 Difference]: Without dead ends: 102 [2023-11-24 22:00:31,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-24 22:00:31,498 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:31,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 22:00:31,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-24 22:00:31,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-11-24 22:00:31,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2023-11-24 22:00:31,537 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 52 [2023-11-24 22:00:31,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:31,537 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2023-11-24 22:00:31,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2023-11-24 22:00:31,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-24 22:00:31,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:31,544 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:31,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 22:00:31,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:31,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:31,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:31,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1099815446, now seen corresponding path program 4 times [2023-11-24 22:00:31,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:31,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482529319] [2023-11-24 22:00:31,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:31,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2023-11-24 22:00:33,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:33,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482529319] [2023-11-24 22:00:33,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482529319] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:33,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798241812] [2023-11-24 22:00:33,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 22:00:33,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:33,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:33,080 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:33,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 22:00:33,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 22:00:33,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:00:33,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-24 22:00:33,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2023-11-24 22:00:33,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:00:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2023-11-24 22:00:34,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798241812] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:00:34,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:00:34,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-24 22:00:34,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385185199] [2023-11-24 22:00:34,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:00:34,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-24 22:00:34,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:34,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-24 22:00:34,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-24 22:00:34,444 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 49 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 48 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:35,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:35,179 INFO L93 Difference]: Finished difference Result 276 states and 379 transitions. [2023-11-24 22:00:35,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-24 22:00:35,180 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 48 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2023-11-24 22:00:35,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:35,182 INFO L225 Difference]: With dead ends: 276 [2023-11-24 22:00:35,182 INFO L226 Difference]: Without dead ends: 198 [2023-11-24 22:00:35,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-24 22:00:35,185 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:35,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 22:00:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-24 22:00:35,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2023-11-24 22:00:35,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0253807106598984) internal successors, (202), 197 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:35,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2023-11-24 22:00:35,215 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 100 [2023-11-24 22:00:35,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:35,216 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2023-11-24 22:00:35,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 48 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:35,217 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2023-11-24 22:00:35,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-11-24 22:00:35,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:35,224 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:35,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 22:00:35,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:35,425 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:35,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:35,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1795725546, now seen corresponding path program 5 times [2023-11-24 22:00:35,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:35,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953713054] [2023-11-24 22:00:35,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:35,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2023-11-24 22:00:39,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:39,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953713054] [2023-11-24 22:00:39,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953713054] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:39,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258349170] [2023-11-24 22:00:39,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 22:00:39,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:39,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:39,799 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:39,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45eed81c-534f-4d14-88e7-646947e9e283/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process