./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-43.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-43.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ --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 795f4667c1e1102b044359aec08de90b52cc6317a469c691f5b4c1088e37925d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:32:49,281 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:32:49,356 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:32:49,362 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:32:49,363 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:32:49,394 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:32:49,396 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:32:49,397 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:32:49,398 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:32:49,403 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:32:49,404 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:32:49,405 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:32:49,406 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:32:49,408 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:32:49,408 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:32:49,409 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:32:49,409 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:32:49,410 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:32:49,410 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:32:49,411 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:32:49,411 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:32:49,412 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:32:49,412 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:32:49,413 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:32:49,413 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:32:49,414 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:32:49,414 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:32:49,415 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:32:49,415 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:32:49,416 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:32:49,417 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:32:49,417 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:32:49,418 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:32:49,418 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:32:49,418 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:32:49,419 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:32:49,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:32:49,419 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:32:49,419 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:32:49,420 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:32:49,420 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:32:49,420 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:32:49,421 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 795f4667c1e1102b044359aec08de90b52cc6317a469c691f5b4c1088e37925d [2023-11-23 22:32:49,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:32:49,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:32:49,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:32:49,754 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:32:49,755 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:32:49,756 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-43.i [2023-11-23 22:32:52,826 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:32:53,183 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:32:53,186 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-43.i [2023-11-23 22:32:53,204 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/data/847e0571b/703dca52bf43454daba219750287cb86/FLAGdbb466318 [2023-11-23 22:32:53,222 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/data/847e0571b/703dca52bf43454daba219750287cb86 [2023-11-23 22:32:53,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:32:53,231 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:32:53,235 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:32:53,235 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:32:53,241 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:32:53,243 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:32:53" (1/1) ... [2023-11-23 22:32:53,244 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7204ae6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:53, skipping insertion in model container [2023-11-23 22:32:53,245 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:32:53" (1/1) ... [2023-11-23 22:32:53,316 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:32:53,518 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_6d02c319-263e-4b89-bfc7-44fa37c5aadc/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-43.i[916,929] [2023-11-23 22:32:53,725 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:32:53,739 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:32:53,759 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_6d02c319-263e-4b89-bfc7-44fa37c5aadc/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-43.i[916,929] [2023-11-23 22:32:53,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:32:53,912 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:32:53,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:53 WrapperNode [2023-11-23 22:32:53,912 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:32:53,914 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:32:53,915 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:32:53,915 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:32:53,923 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:53" (1/1) ... [2023-11-23 22:32:53,951 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:53" (1/1) ... [2023-11-23 22:32:54,120 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 528 [2023-11-23 22:32:54,121 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:32:54,122 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:32:54,122 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:32:54,122 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:32:54,133 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:53" (1/1) ... [2023-11-23 22:32:54,134 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:53" (1/1) ... [2023-11-23 22:32:54,182 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:53" (1/1) ... [2023-11-23 22:32:54,261 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 22:32:54,262 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:53" (1/1) ... [2023-11-23 22:32:54,262 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:53" (1/1) ... [2023-11-23 22:32:54,317 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:53" (1/1) ... [2023-11-23 22:32:54,326 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:53" (1/1) ... [2023-11-23 22:32:54,351 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:53" (1/1) ... [2023-11-23 22:32:54,360 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:53" (1/1) ... [2023-11-23 22:32:54,390 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:32:54,392 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:32:54,392 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:32:54,392 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:32:54,393 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:53" (1/1) ... [2023-11-23 22:32:54,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:32:54,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:54,426 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:32:54,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:32:54,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:32:54,468 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 22:32:54,468 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 22:32:54,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:32:54,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:32:54,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:32:54,597 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:32:54,599 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:32:55,672 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:32:55,738 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:32:55,739 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 22:32:55,740 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:32:55 BoogieIcfgContainer [2023-11-23 22:32:55,740 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:32:55,745 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:32:55,746 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:32:55,749 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:32:55,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:32:53" (1/3) ... [2023-11-23 22:32:55,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cfc3865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:32:55, skipping insertion in model container [2023-11-23 22:32:55,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:53" (2/3) ... [2023-11-23 22:32:55,753 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cfc3865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:32:55, skipping insertion in model container [2023-11-23 22:32:55,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:32:55" (3/3) ... [2023-11-23 22:32:55,756 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-43.i [2023-11-23 22:32:55,780 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:32:55,781 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:32:55,855 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:32:55,864 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;@48e2d5ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:32:55,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 22:32:55,871 INFO L276 IsEmpty]: Start isEmpty. Operand has 208 states, 142 states have (on average 1.528169014084507) internal successors, (217), 143 states have internal predecessors, (217), 63 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2023-11-23 22:32:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2023-11-23 22:32:55,911 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:55,912 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:55,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:32:55,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:55,918 INFO L85 PathProgramCache]: Analyzing trace with hash 860894165, now seen corresponding path program 1 times [2023-11-23 22:32:55,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:55,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954297257] [2023-11-23 22:32:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:55,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:56,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:56,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954297257] [2023-11-23 22:32:56,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 22:32:56,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670727451] [2023-11-23 22:32:56,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:56,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:56,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:56,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:56,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:32:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:56,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 22:32:56,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 7688 trivial. 0 not checked. [2023-11-23 22:32:56,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:32:56,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670727451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:56,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:56,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:32:56,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478169018] [2023-11-23 22:32:56,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:56,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 22:32:56,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:57,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 22:32:57,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:32:57,017 INFO L87 Difference]: Start difference. First operand has 208 states, 142 states have (on average 1.528169014084507) internal successors, (217), 143 states have internal predecessors, (217), 63 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) Second operand has 2 states, 2 states have (on average 48.5) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-23 22:32:57,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:57,120 INFO L93 Difference]: Finished difference Result 413 states and 747 transitions. [2023-11-23 22:32:57,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 22:32:57,123 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 48.5) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) Word has length 407 [2023-11-23 22:32:57,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:57,140 INFO L225 Difference]: With dead ends: 413 [2023-11-23 22:32:57,141 INFO L226 Difference]: Without dead ends: 206 [2023-11-23 22:32:57,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:32:57,158 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:57,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 334 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:32:57,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-11-23 22:32:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2023-11-23 22:32:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 141 states have (on average 1.49645390070922) internal successors, (211), 141 states have internal predecessors, (211), 63 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2023-11-23 22:32:57,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 337 transitions. [2023-11-23 22:32:57,262 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 337 transitions. Word has length 407 [2023-11-23 22:32:57,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:57,265 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 337 transitions. [2023-11-23 22:32:57,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 48.5) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-23 22:32:57,266 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 337 transitions. [2023-11-23 22:32:57,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2023-11-23 22:32:57,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:57,286 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:57,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 22:32:57,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 22:32:57,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:32:57,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:57,509 INFO L85 PathProgramCache]: Analyzing trace with hash 660715339, now seen corresponding path program 1 times [2023-11-23 22:32:57,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:57,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609231834] [2023-11-23 22:32:57,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:57,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:57,692 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:32:57,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285686662] [2023-11-23 22:32:57,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:57,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:57,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:57,699 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:57,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:32:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:58,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 22:32:58,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-23 22:32:58,865 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:32:58,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:58,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609231834] [2023-11-23 22:32:58,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:32:58,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285686662] [2023-11-23 22:32:58,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285686662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:58,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:58,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:32:58,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312998661] [2023-11-23 22:32:58,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:58,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:58,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:58,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:58,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:58,872 INFO L87 Difference]: Start difference. First operand 206 states and 337 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-23 22:32:58,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:58,976 INFO L93 Difference]: Finished difference Result 616 states and 1009 transitions. [2023-11-23 22:32:58,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:58,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 407 [2023-11-23 22:32:58,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:58,984 INFO L225 Difference]: With dead ends: 616 [2023-11-23 22:32:58,984 INFO L226 Difference]: Without dead ends: 411 [2023-11-23 22:32:58,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:58,987 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 145 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:58,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 765 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:32:58,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2023-11-23 22:32:59,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 409. [2023-11-23 22:32:59,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 280 states have (on average 1.4857142857142858) internal successors, (416), 280 states have internal predecessors, (416), 126 states have call successors, (126), 2 states have call predecessors, (126), 2 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-11-23 22:32:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 668 transitions. [2023-11-23 22:32:59,067 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 668 transitions. Word has length 407 [2023-11-23 22:32:59,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:59,070 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 668 transitions. [2023-11-23 22:32:59,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-23 22:32:59,070 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 668 transitions. [2023-11-23 22:32:59,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2023-11-23 22:32:59,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:59,075 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:59,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:32:59,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:59,298 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:32:59,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:59,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1584864115, now seen corresponding path program 1 times [2023-11-23 22:32:59,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:59,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301884697] [2023-11-23 22:32:59,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:59,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:59,383 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:32:59,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221598801] [2023-11-23 22:32:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:59,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:59,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:59,385 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:59,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:32:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:59,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:32:59,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-23 22:33:00,280 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:33:00,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:00,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301884697] [2023-11-23 22:33:00,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:33:00,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221598801] [2023-11-23 22:33:00,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221598801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:00,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:00,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:33:00,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871503194] [2023-11-23 22:33:00,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:00,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:33:00,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:00,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:33:00,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:33:00,285 INFO L87 Difference]: Start difference. First operand 409 states and 668 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-23 22:33:00,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:33:00,709 INFO L93 Difference]: Finished difference Result 1417 states and 2306 transitions. [2023-11-23 22:33:00,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:33:00,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 407 [2023-11-23 22:33:00,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:33:00,720 INFO L225 Difference]: With dead ends: 1417 [2023-11-23 22:33:00,720 INFO L226 Difference]: Without dead ends: 1009 [2023-11-23 22:33:00,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:33:00,723 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 403 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:33:00,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 1102 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:33:00,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2023-11-23 22:33:00,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 975. [2023-11-23 22:33:00,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 718 states have (on average 1.5153203342618384) internal successors, (1088), 718 states have internal predecessors, (1088), 252 states have call successors, (252), 4 states have call predecessors, (252), 4 states have return successors, (252), 252 states have call predecessors, (252), 252 states have call successors, (252) [2023-11-23 22:33:00,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1592 transitions. [2023-11-23 22:33:00,906 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1592 transitions. Word has length 407 [2023-11-23 22:33:00,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:33:00,909 INFO L495 AbstractCegarLoop]: Abstraction has 975 states and 1592 transitions. [2023-11-23 22:33:00,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-23 22:33:00,910 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1592 transitions. [2023-11-23 22:33:00,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2023-11-23 22:33:00,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:33:00,916 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:00,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:33:01,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:01,129 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:33:01,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:01,130 INFO L85 PathProgramCache]: Analyzing trace with hash 807966347, now seen corresponding path program 1 times [2023-11-23 22:33:01,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:01,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217144168] [2023-11-23 22:33:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:01,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:01,239 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:33:01,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698991648] [2023-11-23 22:33:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:01,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:01,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:01,241 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:01,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:33:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:01,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:33:01,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-23 22:33:02,206 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:33:02,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:02,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217144168] [2023-11-23 22:33:02,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:33:02,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698991648] [2023-11-23 22:33:02,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698991648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:02,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:02,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:33:02,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423057833] [2023-11-23 22:33:02,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:02,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:33:02,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:02,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:33:02,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:33:02,216 INFO L87 Difference]: Start difference. First operand 975 states and 1592 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-23 22:33:02,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:33:02,602 INFO L93 Difference]: Finished difference Result 2521 states and 4114 transitions. [2023-11-23 22:33:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:33:02,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 408 [2023-11-23 22:33:02,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:33:02,616 INFO L225 Difference]: With dead ends: 2521 [2023-11-23 22:33:02,616 INFO L226 Difference]: Without dead ends: 1547 [2023-11-23 22:33:02,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:33:02,621 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 252 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:33:02,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 973 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:33:02,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2023-11-23 22:33:02,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1525. [2023-11-23 22:33:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1204 states have (on average 1.5465116279069768) internal successors, (1862), 1204 states have internal predecessors, (1862), 315 states have call successors, (315), 5 states have call predecessors, (315), 5 states have return successors, (315), 315 states have call predecessors, (315), 315 states have call successors, (315) [2023-11-23 22:33:02,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 2492 transitions. [2023-11-23 22:33:02,835 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 2492 transitions. Word has length 408 [2023-11-23 22:33:02,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:33:02,836 INFO L495 AbstractCegarLoop]: Abstraction has 1525 states and 2492 transitions. [2023-11-23 22:33:02,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-23 22:33:02,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 2492 transitions. [2023-11-23 22:33:02,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2023-11-23 22:33:02,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:33:02,841 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:02,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:33:03,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:03,057 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:33:03,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:03,057 INFO L85 PathProgramCache]: Analyzing trace with hash 948514957, now seen corresponding path program 1 times [2023-11-23 22:33:03,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:03,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881595781] [2023-11-23 22:33:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:03,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:03,119 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:33:03,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700929051] [2023-11-23 22:33:03,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:03,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:03,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:03,120 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:03,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:33:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:03,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:33:03,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 1988 proven. 159 refuted. 0 times theorem prover too weak. 5665 trivial. 0 not checked. [2023-11-23 22:33:03,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:33:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 27 proven. 159 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-11-23 22:33:04,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:04,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881595781] [2023-11-23 22:33:04,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:33:04,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700929051] [2023-11-23 22:33:04,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700929051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:33:04,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:33:04,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-23 22:33:04,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037602490] [2023-11-23 22:33:04,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:33:04,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:33:04,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:04,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:33:04,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:33:04,448 INFO L87 Difference]: Start difference. First operand 1525 states and 2492 transitions. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 2 states have call successors, (116), 2 states have call predecessors, (116), 4 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) [2023-11-23 22:33:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:33:04,921 INFO L93 Difference]: Finished difference Result 2971 states and 4826 transitions. [2023-11-23 22:33:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:33:04,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 2 states have call successors, (116), 2 states have call predecessors, (116), 4 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) Word has length 408 [2023-11-23 22:33:04,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:33:04,938 INFO L225 Difference]: With dead ends: 2971 [2023-11-23 22:33:04,939 INFO L226 Difference]: Without dead ends: 1565 [2023-11-23 22:33:04,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 808 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:33:04,947 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 178 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:33:04,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 660 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:33:04,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2023-11-23 22:33:05,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1545. [2023-11-23 22:33:05,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1219 states have (on average 1.5299425758818703) internal successors, (1865), 1219 states have internal predecessors, (1865), 315 states have call successors, (315), 10 states have call predecessors, (315), 10 states have return successors, (315), 315 states have call predecessors, (315), 315 states have call successors, (315) [2023-11-23 22:33:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2495 transitions. [2023-11-23 22:33:05,081 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2495 transitions. Word has length 408 [2023-11-23 22:33:05,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:33:05,083 INFO L495 AbstractCegarLoop]: Abstraction has 1545 states and 2495 transitions. [2023-11-23 22:33:05,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 2 states have call successors, (116), 2 states have call predecessors, (116), 4 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) [2023-11-23 22:33:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2495 transitions. [2023-11-23 22:33:05,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2023-11-23 22:33:05,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:33:05,089 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:05,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:33:05,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:05,311 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:33:05,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:05,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1100872885, now seen corresponding path program 1 times [2023-11-23 22:33:05,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:05,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458655798] [2023-11-23 22:33:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:05,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:05,384 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:33:05,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857631296] [2023-11-23 22:33:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:05,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:05,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:05,386 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:05,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:33:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:05,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 22:33:05,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 4925 proven. 153 refuted. 0 times theorem prover too weak. 2734 trivial. 0 not checked. [2023-11-23 22:33:06,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:33:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 213 proven. 156 refuted. 0 times theorem prover too weak. 7443 trivial. 0 not checked. [2023-11-23 22:33:06,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:06,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458655798] [2023-11-23 22:33:06,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:33:06,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857631296] [2023-11-23 22:33:06,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857631296] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:33:06,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:33:06,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-23 22:33:06,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946895479] [2023-11-23 22:33:06,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:33:06,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 22:33:06,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:06,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 22:33:06,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-11-23 22:33:06,939 INFO L87 Difference]: Start difference. First operand 1545 states and 2495 transitions. Second operand has 14 states, 14 states have (on average 10.714285714285714) internal successors, (150), 14 states have internal predecessors, (150), 5 states have call successors, (104), 3 states have call predecessors, (104), 7 states have return successors, (105), 5 states have call predecessors, (105), 5 states have call successors, (105) [2023-11-23 22:33:07,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:33:07,777 INFO L93 Difference]: Finished difference Result 1601 states and 2541 transitions. [2023-11-23 22:33:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 22:33:07,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.714285714285714) internal successors, (150), 14 states have internal predecessors, (150), 5 states have call successors, (104), 3 states have call predecessors, (104), 7 states have return successors, (105), 5 states have call predecessors, (105), 5 states have call successors, (105) Word has length 408 [2023-11-23 22:33:07,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:33:07,786 INFO L225 Difference]: With dead ends: 1601 [2023-11-23 22:33:07,786 INFO L226 Difference]: Without dead ends: 888 [2023-11-23 22:33:07,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 826 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2023-11-23 22:33:07,791 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 1059 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:33:07,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 632 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 22:33:07,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2023-11-23 22:33:07,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 870. [2023-11-23 22:33:07,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 665 states have (on average 1.4721804511278196) internal successors, (979), 665 states have internal predecessors, (979), 189 states have call successors, (189), 15 states have call predecessors, (189), 15 states have return successors, (189), 189 states have call predecessors, (189), 189 states have call successors, (189) [2023-11-23 22:33:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1357 transitions. [2023-11-23 22:33:07,883 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1357 transitions. Word has length 408 [2023-11-23 22:33:07,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:33:07,885 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 1357 transitions. [2023-11-23 22:33:07,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.714285714285714) internal successors, (150), 14 states have internal predecessors, (150), 5 states have call successors, (104), 3 states have call predecessors, (104), 7 states have return successors, (105), 5 states have call predecessors, (105), 5 states have call successors, (105) [2023-11-23 22:33:07,886 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1357 transitions. [2023-11-23 22:33:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-23 22:33:07,890 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:33:07,890 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:07,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:33:08,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 22:33:08,117 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:33:08,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:08,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1815378602, now seen corresponding path program 1 times [2023-11-23 22:33:08,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:08,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202517590] [2023-11-23 22:33:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:08,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:08,190 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:33:08,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456720475] [2023-11-23 22:33:08,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:08,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:08,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:08,192 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:08,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:33:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:08,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 22:33:08,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 5013 proven. 168 refuted. 0 times theorem prover too weak. 2631 trivial. 0 not checked. [2023-11-23 22:33:09,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:33:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 198 proven. 171 refuted. 0 times theorem prover too weak. 7443 trivial. 0 not checked. [2023-11-23 22:33:10,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:10,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202517590] [2023-11-23 22:33:10,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:33:10,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456720475] [2023-11-23 22:33:10,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456720475] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:33:10,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:33:10,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-23 22:33:10,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445784381] [2023-11-23 22:33:10,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:33:10,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 22:33:10,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:10,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 22:33:10,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-11-23 22:33:10,023 INFO L87 Difference]: Start difference. First operand 870 states and 1357 transitions. Second operand has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 14 states have internal predecessors, (156), 5 states have call successors, (98), 3 states have call predecessors, (98), 7 states have return successors, (99), 5 states have call predecessors, (99), 5 states have call successors, (99) [2023-11-23 22:33:11,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:33:11,008 INFO L93 Difference]: Finished difference Result 1652 states and 2548 transitions. [2023-11-23 22:33:11,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 22:33:11,010 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 14 states have internal predecessors, (156), 5 states have call successors, (98), 3 states have call predecessors, (98), 7 states have return successors, (99), 5 states have call predecessors, (99), 5 states have call successors, (99) Word has length 409 [2023-11-23 22:33:11,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:33:11,019 INFO L225 Difference]: With dead ends: 1652 [2023-11-23 22:33:11,019 INFO L226 Difference]: Without dead ends: 924 [2023-11-23 22:33:11,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 805 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2023-11-23 22:33:11,023 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 687 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 22:33:11,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 587 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 22:33:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2023-11-23 22:33:11,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 894. [2023-11-23 22:33:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 683 states have (on average 1.4553440702781846) internal successors, (994), 683 states have internal predecessors, (994), 189 states have call successors, (189), 21 states have call predecessors, (189), 21 states have return successors, (189), 189 states have call predecessors, (189), 189 states have call successors, (189) [2023-11-23 22:33:11,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1372 transitions. [2023-11-23 22:33:11,134 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1372 transitions. Word has length 409 [2023-11-23 22:33:11,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:33:11,136 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 1372 transitions. [2023-11-23 22:33:11,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 14 states have internal predecessors, (156), 5 states have call successors, (98), 3 states have call predecessors, (98), 7 states have return successors, (99), 5 states have call predecessors, (99), 5 states have call successors, (99) [2023-11-23 22:33:11,136 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1372 transitions. [2023-11-23 22:33:11,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-23 22:33:11,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:33:11,141 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:11,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:33:11,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 22:33:11,357 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:33:11,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:11,358 INFO L85 PathProgramCache]: Analyzing trace with hash 786019304, now seen corresponding path program 1 times [2023-11-23 22:33:11,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:11,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475736491] [2023-11-23 22:33:11,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:11,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:11,448 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:33:11,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329234446] [2023-11-23 22:33:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:11,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:11,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:11,451 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:11,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:33:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:11,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:33:11,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-23 22:33:12,482 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:33:12,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:12,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475736491] [2023-11-23 22:33:12,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:33:12,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329234446] [2023-11-23 22:33:12,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329234446] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:12,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:12,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:33:12,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348150037] [2023-11-23 22:33:12,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:12,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:33:12,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:12,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:33:12,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:33:12,487 INFO L87 Difference]: Start difference. First operand 894 states and 1372 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-23 22:33:12,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:33:12,954 INFO L93 Difference]: Finished difference Result 2784 states and 4317 transitions. [2023-11-23 22:33:12,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:33:12,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 409 [2023-11-23 22:33:12,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:33:12,972 INFO L225 Difference]: With dead ends: 2784 [2023-11-23 22:33:12,972 INFO L226 Difference]: Without dead ends: 2021 [2023-11-23 22:33:12,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:33:12,977 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 512 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:33:12,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 965 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:33:12,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2023-11-23 22:33:13,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1652. [2023-11-23 22:33:13,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1301 states have (on average 1.471944657955419) internal successors, (1915), 1301 states have internal predecessors, (1915), 315 states have call successors, (315), 35 states have call predecessors, (315), 35 states have return successors, (315), 315 states have call predecessors, (315), 315 states have call successors, (315) [2023-11-23 22:33:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 2545 transitions. [2023-11-23 22:33:13,194 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 2545 transitions. Word has length 409 [2023-11-23 22:33:13,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:33:13,195 INFO L495 AbstractCegarLoop]: Abstraction has 1652 states and 2545 transitions. [2023-11-23 22:33:13,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-23 22:33:13,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 2545 transitions. [2023-11-23 22:33:13,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-23 22:33:13,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:33:13,200 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:13,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 22:33:13,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:13,417 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:33:13,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:13,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2122162582, now seen corresponding path program 1 times [2023-11-23 22:33:13,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:13,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113117683] [2023-11-23 22:33:13,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:13,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:13,475 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:33:13,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41116669] [2023-11-23 22:33:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:13,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:13,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:13,477 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:13,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d02c319-263e-4b89-bfc7-44fa37c5aadc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:33:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:13,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-23 22:33:13,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 4580 proven. 186 refuted. 0 times theorem prover too weak. 3046 trivial. 0 not checked. [2023-11-23 22:33:20,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:33:25,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:25,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113117683] [2023-11-23 22:33:25,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:33:25,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41116669] [2023-11-23 22:33:25,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41116669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:33:25,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:33:25,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-23 22:33:25,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107280670] [2023-11-23 22:33:25,858 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 22:33:25,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 22:33:25,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:25,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 22:33:25,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=268, Unknown=1, NotChecked=0, Total=342 [2023-11-23 22:33:25,861 INFO L87 Difference]: Start difference. First operand 1652 states and 2545 transitions. Second operand has 16 states, 16 states have (on average 7.1875) internal successors, (115), 14 states have internal predecessors, (115), 5 states have call successors, (63), 5 states have call predecessors, (63), 7 states have return successors, (63), 5 states have call predecessors, (63), 5 states have call successors, (63) [2023-11-23 22:33:29,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-23 22:33:31,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-23 22:33:34,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-23 22:33:36,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-23 22:33:38,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-23 22:33:40,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-23 22:33:42,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-23 22:33:44,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0]