./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-16.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/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_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-16.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/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_fa357707-eaae-4667-8c78-9800ffe479e1/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 df6fdde44141809a8cc62cf4df1f7a775595df77bee8179d0eb98677b5489ce6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:34:29,557 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:34:29,687 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:34:29,695 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:34:29,696 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:34:29,736 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:34:29,737 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:34:29,738 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:34:29,739 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:34:29,744 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:34:29,744 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:34:29,745 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:34:29,746 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:34:29,748 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:34:29,748 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:34:29,749 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:34:29,749 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:34:29,750 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:34:29,750 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:34:29,751 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:34:29,751 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:34:29,752 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:34:29,752 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:34:29,753 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:34:29,753 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:34:29,754 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:34:29,754 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:34:29,755 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:34:29,756 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:34:29,756 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:34:29,757 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:34:29,758 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:34:29,758 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:34:29,758 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:34:29,759 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:34:29,759 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:34:29,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:34:29,760 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:34:29,760 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:34:29,760 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:34:29,761 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:34:29,761 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:34:29,761 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_fa357707-eaae-4667-8c78-9800ffe479e1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df6fdde44141809a8cc62cf4df1f7a775595df77bee8179d0eb98677b5489ce6 [2023-11-23 22:34:30,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:34:30,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:34:30,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:34:30,138 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:34:30,139 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:34:30,140 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-16.i [2023-11-23 22:34:33,165 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:34:33,441 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:34:33,442 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-16.i [2023-11-23 22:34:33,465 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/data/4432c805a/8e940a6a12534891b8f82df51b250f59/FLAGc41361899 [2023-11-23 22:34:33,478 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/data/4432c805a/8e940a6a12534891b8f82df51b250f59 [2023-11-23 22:34:33,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:34:33,483 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:34:33,484 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:34:33,485 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:34:33,490 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:34:33,491 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:34:33" (1/1) ... [2023-11-23 22:34:33,493 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6280a81a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:33, skipping insertion in model container [2023-11-23 22:34:33,493 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:34:33" (1/1) ... [2023-11-23 22:34:33,539 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:34:33,716 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_fa357707-eaae-4667-8c78-9800ffe479e1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-16.i[916,929] [2023-11-23 22:34:33,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:34:33,947 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:34:33,964 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_fa357707-eaae-4667-8c78-9800ffe479e1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-16.i[916,929] [2023-11-23 22:34:34,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:34:34,155 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:34:34,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:34 WrapperNode [2023-11-23 22:34:34,168 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:34:34,170 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:34:34,170 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:34:34,170 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:34:34,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:34" (1/1) ... [2023-11-23 22:34:34,223 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:34" (1/1) ... [2023-11-23 22:34:34,311 INFO L138 Inliner]: procedures = 26, calls = 87, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 574 [2023-11-23 22:34:34,312 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:34:34,313 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:34:34,313 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:34:34,313 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:34:34,325 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:34" (1/1) ... [2023-11-23 22:34:34,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:34" (1/1) ... [2023-11-23 22:34:34,345 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:34" (1/1) ... [2023-11-23 22:34:34,372 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 22:34:34,372 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:34" (1/1) ... [2023-11-23 22:34:34,372 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:34" (1/1) ... [2023-11-23 22:34:34,422 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:34" (1/1) ... [2023-11-23 22:34:34,429 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:34" (1/1) ... [2023-11-23 22:34:34,452 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:34" (1/1) ... [2023-11-23 22:34:34,459 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:34" (1/1) ... [2023-11-23 22:34:34,473 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:34:34,474 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:34:34,474 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:34:34,474 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:34:34,475 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:34" (1/1) ... [2023-11-23 22:34:34,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:34:34,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:34,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:34:34,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:34:34,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:34:34,557 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 22:34:34,558 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 22:34:34,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:34:34,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:34:34,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:34:34,691 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:34:34,693 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:34:35,575 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:34:35,671 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:34:35,671 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 22:34:35,672 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:34:35 BoogieIcfgContainer [2023-11-23 22:34:35,672 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:34:35,675 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:34:35,675 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:34:35,679 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:34:35,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:34:33" (1/3) ... [2023-11-23 22:34:35,680 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463320d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:34:35, skipping insertion in model container [2023-11-23 22:34:35,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:34" (2/3) ... [2023-11-23 22:34:35,682 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463320d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:34:35, skipping insertion in model container [2023-11-23 22:34:35,683 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:34:35" (3/3) ... [2023-11-23 22:34:35,684 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-16.i [2023-11-23 22:34:35,705 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:34:35,705 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:34:35,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:34:35,780 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;@4dfd6983, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:34:35,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 22:34:35,788 INFO L276 IsEmpty]: Start isEmpty. Operand has 215 states, 138 states have (on average 1.5942028985507246) internal successors, (220), 139 states have internal predecessors, (220), 74 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2023-11-23 22:34:35,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-23 22:34:35,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:35,822 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:35,823 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:35,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:35,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1383171110, now seen corresponding path program 1 times [2023-11-23 22:34:35,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:35,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658189144] [2023-11-23 22:34:35,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:35,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:36,218 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:36,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885425902] [2023-11-23 22:34:36,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:36,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:36,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:36,234 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:36,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:34:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:36,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:34:36,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-23 22:34:36,979 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:34:36,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:36,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658189144] [2023-11-23 22:34:36,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:36,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885425902] [2023-11-23 22:34:36,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885425902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:36,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:36,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:34:36,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848539043] [2023-11-23 22:34:36,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:36,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:34:36,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:37,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:34:37,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:34:37,026 INFO L87 Difference]: Start difference. First operand has 215 states, 138 states have (on average 1.5942028985507246) internal successors, (220), 139 states have internal predecessors, (220), 74 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-23 22:34:37,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:37,464 INFO L93 Difference]: Finished difference Result 697 states and 1346 transitions. [2023-11-23 22:34:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:34:37,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) Word has length 463 [2023-11-23 22:34:37,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:37,486 INFO L225 Difference]: With dead ends: 697 [2023-11-23 22:34:37,486 INFO L226 Difference]: Without dead ends: 483 [2023-11-23 22:34:37,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:34:37,497 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 454 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:37,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 1872 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:34:37,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-11-23 22:34:37,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 363. [2023-11-23 22:34:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 256 states have (on average 1.65234375) internal successors, (423), 257 states have internal predecessors, (423), 104 states have call successors, (104), 2 states have call predecessors, (104), 2 states have return successors, (104), 103 states have call predecessors, (104), 104 states have call successors, (104) [2023-11-23 22:34:37,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 631 transitions. [2023-11-23 22:34:37,687 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 631 transitions. Word has length 463 [2023-11-23 22:34:37,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:37,691 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 631 transitions. [2023-11-23 22:34:37,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-23 22:34:37,692 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 631 transitions. [2023-11-23 22:34:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-23 22:34:37,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:37,723 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:37,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:37,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:37,945 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:37,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:37,946 INFO L85 PathProgramCache]: Analyzing trace with hash 2018309848, now seen corresponding path program 1 times [2023-11-23 22:34:37,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:37,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382913717] [2023-11-23 22:34:37,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:37,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:38,137 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:38,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677071138] [2023-11-23 22:34:38,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:38,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:38,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:38,140 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:38,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:34:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:38,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 22:34:38,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-23 22:34:38,600 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:34:38,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:38,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382913717] [2023-11-23 22:34:38,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:38,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677071138] [2023-11-23 22:34:38,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677071138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:38,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:38,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:34:38,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264539211] [2023-11-23 22:34:38,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:38,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:38,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:38,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:38,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:34:38,611 INFO L87 Difference]: Start difference. First operand 363 states and 631 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-23 22:34:38,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:38,726 INFO L93 Difference]: Finished difference Result 980 states and 1687 transitions. [2023-11-23 22:34:38,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:38,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) Word has length 463 [2023-11-23 22:34:38,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:38,744 INFO L225 Difference]: With dead ends: 980 [2023-11-23 22:34:38,745 INFO L226 Difference]: Without dead ends: 618 [2023-11-23 22:34:38,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 461 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 22:34:38,750 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 245 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:38,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 707 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:34:38,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2023-11-23 22:34:38,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 615. [2023-11-23 22:34:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 420 states have (on average 1.6023809523809525) internal successors, (673), 423 states have internal predecessors, (673), 190 states have call successors, (190), 4 states have call predecessors, (190), 4 states have return successors, (190), 187 states have call predecessors, (190), 190 states have call successors, (190) [2023-11-23 22:34:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1053 transitions. [2023-11-23 22:34:38,847 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1053 transitions. Word has length 463 [2023-11-23 22:34:38,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:38,850 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 1053 transitions. [2023-11-23 22:34:38,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-23 22:34:38,850 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1053 transitions. [2023-11-23 22:34:38,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-23 22:34:38,876 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:38,877 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:38,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:39,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:39,084 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:39,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:39,085 INFO L85 PathProgramCache]: Analyzing trace with hash -890454054, now seen corresponding path program 1 times [2023-11-23 22:34:39,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:39,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578515150] [2023-11-23 22:34:39,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:39,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:39,207 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:39,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399399644] [2023-11-23 22:34:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:39,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:39,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:39,216 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:39,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:34:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:39,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 22:34:39,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-23 22:34:39,597 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:34:39,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:39,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578515150] [2023-11-23 22:34:39,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:39,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399399644] [2023-11-23 22:34:39,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399399644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:39,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:39,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:34:39,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237674697] [2023-11-23 22:34:39,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:39,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:39,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:39,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:39,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:34:39,603 INFO L87 Difference]: Start difference. First operand 615 states and 1053 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-23 22:34:39,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:39,727 INFO L93 Difference]: Finished difference Result 1719 states and 2916 transitions. [2023-11-23 22:34:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:39,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) Word has length 463 [2023-11-23 22:34:39,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:39,739 INFO L225 Difference]: With dead ends: 1719 [2023-11-23 22:34:39,739 INFO L226 Difference]: Without dead ends: 1105 [2023-11-23 22:34:39,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 461 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 22:34:39,743 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 250 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:39,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 880 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:34:39,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2023-11-23 22:34:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1102. [2023-11-23 22:34:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 721 states have (on average 1.5450762829403606) internal successors, (1114), 728 states have internal predecessors, (1114), 372 states have call successors, (372), 8 states have call predecessors, (372), 8 states have return successors, (372), 365 states have call predecessors, (372), 372 states have call successors, (372) [2023-11-23 22:34:39,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1858 transitions. [2023-11-23 22:34:39,905 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1858 transitions. Word has length 463 [2023-11-23 22:34:39,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:39,906 INFO L495 AbstractCegarLoop]: Abstraction has 1102 states and 1858 transitions. [2023-11-23 22:34:39,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-23 22:34:39,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1858 transitions. [2023-11-23 22:34:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-23 22:34:39,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:39,913 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:39,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:40,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:40,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:40,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:40,138 INFO L85 PathProgramCache]: Analyzing trace with hash -467752228, now seen corresponding path program 1 times [2023-11-23 22:34:40,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:40,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556048343] [2023-11-23 22:34:40,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:40,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:40,212 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:40,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039931149] [2023-11-23 22:34:40,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:40,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:40,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:40,214 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:40,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:34:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:40,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:34:40,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-23 22:34:40,585 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:34:40,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:40,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556048343] [2023-11-23 22:34:40,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:40,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039931149] [2023-11-23 22:34:40,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039931149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:40,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:40,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:34:40,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340099766] [2023-11-23 22:34:40,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:40,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:34:40,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:40,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:34:40,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:34:40,591 INFO L87 Difference]: Start difference. First operand 1102 states and 1858 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-23 22:34:40,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:40,837 INFO L93 Difference]: Finished difference Result 2929 states and 4798 transitions. [2023-11-23 22:34:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:34:40,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) Word has length 463 [2023-11-23 22:34:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:40,852 INFO L225 Difference]: With dead ends: 2929 [2023-11-23 22:34:40,852 INFO L226 Difference]: Without dead ends: 1828 [2023-11-23 22:34:40,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:34:40,858 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 167 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:40,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1100 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:34:40,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2023-11-23 22:34:41,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1486. [2023-11-23 22:34:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1081 states have (on average 1.5411655874190564) internal successors, (1666), 1096 states have internal predecessors, (1666), 388 states have call successors, (388), 16 states have call predecessors, (388), 16 states have return successors, (388), 373 states have call predecessors, (388), 388 states have call successors, (388) [2023-11-23 22:34:41,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2442 transitions. [2023-11-23 22:34:41,053 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2442 transitions. Word has length 463 [2023-11-23 22:34:41,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:41,054 INFO L495 AbstractCegarLoop]: Abstraction has 1486 states and 2442 transitions. [2023-11-23 22:34:41,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-23 22:34:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2442 transitions. [2023-11-23 22:34:41,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-23 22:34:41,061 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:41,062 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:41,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:41,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:41,276 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:41,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:41,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1488820582, now seen corresponding path program 1 times [2023-11-23 22:34:41,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:41,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141635141] [2023-11-23 22:34:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:41,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:41,346 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:41,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502547087] [2023-11-23 22:34:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:41,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:41,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:41,348 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:41,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:34:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:41,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:34:41,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-23 22:34:41,737 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:34:41,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:41,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141635141] [2023-11-23 22:34:41,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:41,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502547087] [2023-11-23 22:34:41,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502547087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:41,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:41,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:34:41,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346993472] [2023-11-23 22:34:41,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:41,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:34:41,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:41,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:34:41,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:34:41,742 INFO L87 Difference]: Start difference. First operand 1486 states and 2442 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-23 22:34:42,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:42,097 INFO L93 Difference]: Finished difference Result 3489 states and 5614 transitions. [2023-11-23 22:34:42,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:34:42,098 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) Word has length 463 [2023-11-23 22:34:42,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:42,117 INFO L225 Difference]: With dead ends: 3489 [2023-11-23 22:34:42,118 INFO L226 Difference]: Without dead ends: 2004 [2023-11-23 22:34:42,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:34:42,127 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 209 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:42,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1806 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:34:42,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2023-11-23 22:34:42,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1878. [2023-11-23 22:34:42,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1425 states have (on average 1.5228070175438597) internal successors, (2170), 1448 states have internal predecessors, (2170), 420 states have call successors, (420), 32 states have call predecessors, (420), 32 states have return successors, (420), 397 states have call predecessors, (420), 420 states have call successors, (420) [2023-11-23 22:34:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 3010 transitions. [2023-11-23 22:34:42,326 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 3010 transitions. Word has length 463 [2023-11-23 22:34:42,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:42,328 INFO L495 AbstractCegarLoop]: Abstraction has 1878 states and 3010 transitions. [2023-11-23 22:34:42,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-23 22:34:42,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 3010 transitions. [2023-11-23 22:34:42,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-23 22:34:42,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:42,335 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:42,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:42,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:42,548 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:42,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:42,549 INFO L85 PathProgramCache]: Analyzing trace with hash -787756004, now seen corresponding path program 1 times [2023-11-23 22:34:42,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:42,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284134233] [2023-11-23 22:34:42,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:42,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:42,616 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:42,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496520325] [2023-11-23 22:34:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:42,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:42,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:42,618 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:42,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:34:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:42,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 22:34:42,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:43,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-23 22:34:43,290 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:34:43,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:43,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284134233] [2023-11-23 22:34:43,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:43,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496520325] [2023-11-23 22:34:43,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496520325] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:43,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:43,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 22:34:43,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261258826] [2023-11-23 22:34:43,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:43,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:34:43,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:43,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:34:43,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:34:43,295 INFO L87 Difference]: Start difference. First operand 1878 states and 3010 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-23 22:34:43,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:43,727 INFO L93 Difference]: Finished difference Result 4873 states and 7758 transitions. [2023-11-23 22:34:43,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 22:34:43,728 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) Word has length 463 [2023-11-23 22:34:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:43,747 INFO L225 Difference]: With dead ends: 4873 [2023-11-23 22:34:43,747 INFO L226 Difference]: Without dead ends: 2996 [2023-11-23 22:34:43,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:34:43,755 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 207 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:43,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1758 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:34:43,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2023-11-23 22:34:43,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2342. [2023-11-23 22:34:43,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 1889 states have (on average 1.5426151402858654) internal successors, (2914), 1912 states have internal predecessors, (2914), 420 states have call successors, (420), 32 states have call predecessors, (420), 32 states have return successors, (420), 397 states have call predecessors, (420), 420 states have call successors, (420) [2023-11-23 22:34:43,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 3754 transitions. [2023-11-23 22:34:43,984 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 3754 transitions. Word has length 463 [2023-11-23 22:34:43,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:43,985 INFO L495 AbstractCegarLoop]: Abstraction has 2342 states and 3754 transitions. [2023-11-23 22:34:43,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-23 22:34:43,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 3754 transitions. [2023-11-23 22:34:43,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-23 22:34:43,992 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:43,993 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:44,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:44,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:44,215 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:44,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:44,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2056100130, now seen corresponding path program 1 times [2023-11-23 22:34:44,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:44,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705347443] [2023-11-23 22:34:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:44,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:44,280 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:44,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023386503] [2023-11-23 22:34:44,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:44,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:44,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:44,282 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:44,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:34:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:44,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:34:44,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 3993 proven. 51 refuted. 0 times theorem prover too weak. 6760 trivial. 0 not checked. [2023-11-23 22:34:44,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 168 proven. 51 refuted. 0 times theorem prover too weak. 10585 trivial. 0 not checked. [2023-11-23 22:34:45,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:45,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705347443] [2023-11-23 22:34:45,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:45,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023386503] [2023-11-23 22:34:45,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023386503] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:34:45,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:34:45,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-23 22:34:45,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751853964] [2023-11-23 22:34:45,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:34:45,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:34:45,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:45,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:34:45,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:34:45,183 INFO L87 Difference]: Start difference. First operand 2342 states and 3754 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, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) [2023-11-23 22:34:46,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:46,175 INFO L93 Difference]: Finished difference Result 3705 states and 5930 transitions. [2023-11-23 22:34:46,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:34:46,176 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, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) Word has length 463 [2023-11-23 22:34:46,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:46,187 INFO L225 Difference]: With dead ends: 3705 [2023-11-23 22:34:46,187 INFO L226 Difference]: Without dead ends: 1364 [2023-11-23 22:34:46,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 918 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:34:46,194 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 429 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:46,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 881 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 22:34:46,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2023-11-23 22:34:46,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1337. [2023-11-23 22:34:46,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1037 states have (on average 1.5274831243973) internal successors, (1584), 1049 states have internal predecessors, (1584), 280 states have call successors, (280), 19 states have call predecessors, (280), 19 states have return successors, (280), 268 states have call predecessors, (280), 280 states have call successors, (280) [2023-11-23 22:34:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 2144 transitions. [2023-11-23 22:34:46,310 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 2144 transitions. Word has length 463 [2023-11-23 22:34:46,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:46,311 INFO L495 AbstractCegarLoop]: Abstraction has 1337 states and 2144 transitions. [2023-11-23 22:34:46,312 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, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) [2023-11-23 22:34:46,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 2144 transitions. [2023-11-23 22:34:46,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-23 22:34:46,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:46,318 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:46,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:46,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:46,540 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:46,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:46,541 INFO L85 PathProgramCache]: Analyzing trace with hash 970009825, now seen corresponding path program 1 times [2023-11-23 22:34:46,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:46,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770068376] [2023-11-23 22:34:46,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:46,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:46,617 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:46,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311860962] [2023-11-23 22:34:46,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:46,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:46,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:46,620 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:46,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:34:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:46,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-23 22:34:47,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 7107 proven. 321 refuted. 0 times theorem prover too weak. 3376 trivial. 0 not checked. [2023-11-23 22:34:49,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:52,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:52,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770068376] [2023-11-23 22:34:52,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:52,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311860962] [2023-11-23 22:34:52,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311860962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:52,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:34:52,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-11-23 22:34:52,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956070606] [2023-11-23 22:34:52,573 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 22:34:52,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-23 22:34:52,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:52,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-23 22:34:52,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-11-23 22:34:52,576 INFO L87 Difference]: Start difference. First operand 1337 states and 2144 transitions. Second operand has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 22 states have internal predecessors, (121), 6 states have call successors, (74), 6 states have call predecessors, (74), 9 states have return successors, (74), 6 states have call predecessors, (74), 6 states have call successors, (74) [2023-11-23 22:34:58,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:58,153 INFO L93 Difference]: Finished difference Result 7019 states and 11054 transitions. [2023-11-23 22:34:58,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-23 22:34:58,155 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 22 states have internal predecessors, (121), 6 states have call successors, (74), 6 states have call predecessors, (74), 9 states have return successors, (74), 6 states have call predecessors, (74), 6 states have call successors, (74) Word has length 464 [2023-11-23 22:34:58,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:58,230 INFO L225 Difference]: With dead ends: 7019 [2023-11-23 22:34:58,230 INFO L226 Difference]: Without dead ends: 5778 [2023-11-23 22:34:58,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=937, Invalid=3095, Unknown=0, NotChecked=0, Total=4032 [2023-11-23 22:34:58,237 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 3233 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3332 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 3286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 767 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:58,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3332 Valid, 1941 Invalid, 3286 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [767 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-23 22:34:58,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5778 states. [2023-11-23 22:34:58,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5778 to 3526. [2023-11-23 22:34:58,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 2873 states have (on average 1.5315001740341108) internal successors, (4400), 2909 states have internal predecessors, (4400), 584 states have call successors, (584), 68 states have call predecessors, (584), 68 states have return successors, (584), 548 states have call predecessors, (584), 584 states have call successors, (584) [2023-11-23 22:34:58,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 5568 transitions. [2023-11-23 22:34:58,683 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 5568 transitions. Word has length 464 [2023-11-23 22:34:58,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:58,685 INFO L495 AbstractCegarLoop]: Abstraction has 3526 states and 5568 transitions. [2023-11-23 22:34:58,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 22 states have internal predecessors, (121), 6 states have call successors, (74), 6 states have call predecessors, (74), 9 states have return successors, (74), 6 states have call predecessors, (74), 6 states have call successors, (74) [2023-11-23 22:34:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 5568 transitions. [2023-11-23 22:34:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-23 22:34:58,695 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:58,696 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:58,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:58,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 22:34:58,912 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:58,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:58,913 INFO L85 PathProgramCache]: Analyzing trace with hash 992642079, now seen corresponding path program 1 times [2023-11-23 22:34:58,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:58,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316620254] [2023-11-23 22:34:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:58,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:58,994 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:58,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846444040] [2023-11-23 22:34:58,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:58,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:58,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:58,997 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:59,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa357707-eaae-4667-8c78-9800ffe479e1/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:34:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:59,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-23 22:34:59,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 6985 proven. 396 refuted. 0 times theorem prover too weak. 3423 trivial. 0 not checked. [2023-11-23 22:35:02,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:35:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 174 proven. 45 refuted. 0 times theorem prover too weak. 10585 trivial. 0 not checked. [2023-11-23 22:35:04,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:04,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316620254] [2023-11-23 22:35:04,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:35:04,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846444040] [2023-11-23 22:35:04,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846444040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:35:04,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:35:04,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11] total 32 [2023-11-23 22:35:04,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186725936] [2023-11-23 22:35:04,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:35:04,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-23 22:35:04,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:04,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-23 22:35:04,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2023-11-23 22:35:04,370 INFO L87 Difference]: Start difference. First operand 3526 states and 5568 transitions. Second operand has 32 states, 32 states have (on average 5.21875) internal successors, (167), 30 states have internal predecessors, (167), 7 states have call successors, (113), 6 states have call predecessors, (113), 10 states have return successors, (114), 7 states have call predecessors, (114), 7 states have call successors, (114)