./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 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/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_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme --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 0.2.4-dev-0e0057c [2023-11-26 11:55:27,698 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:55:27,803 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:55:27,811 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:55:27,812 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:55:27,852 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:55:27,853 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:55:27,853 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:55:27,854 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:55:27,854 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:55:27,855 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:55:27,856 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:55:27,856 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:55:27,857 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:55:27,858 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:55:27,858 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:55:27,859 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:55:27,859 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:55:27,860 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:55:27,860 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:55:27,861 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:55:27,861 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:55:27,862 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:55:27,862 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:55:27,863 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:55:27,863 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:55:27,864 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:55:27,864 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:55:27,864 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:55:27,865 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:55:27,865 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:55:27,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:27,866 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:55:27,867 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:55:27,867 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:55:27,867 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:55:27,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:55:27,868 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:55:27,869 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:55:27,869 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:55:27,869 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:55:27,870 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:55:27,870 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_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df6fdde44141809a8cc62cf4df1f7a775595df77bee8179d0eb98677b5489ce6 [2023-11-26 11:55:28,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:55:28,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:55:28,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:55:28,192 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:55:28,193 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:55:28,194 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-16.i [2023-11-26 11:55:31,438 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:55:31,689 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:55:31,690 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-16.i [2023-11-26 11:55:31,703 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/data/815f63c34/7856d706c11a40e4a8fd7bc7c80afce8/FLAG31d55e15f [2023-11-26 11:55:31,718 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/data/815f63c34/7856d706c11a40e4a8fd7bc7c80afce8 [2023-11-26 11:55:31,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:55:31,723 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:55:31,724 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:31,725 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:55:31,730 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:55:31,731 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:31" (1/1) ... [2023-11-26 11:55:31,732 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f795013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:31, skipping insertion in model container [2023-11-26 11:55:31,733 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:31" (1/1) ... [2023-11-26 11:55:31,781 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:55:31,957 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_1dc34391-19eb-4d01-8903-b315b4d82cc8/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-16.i[916,929] [2023-11-26 11:55:32,123 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:32,146 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:55:32,167 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_1dc34391-19eb-4d01-8903-b315b4d82cc8/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-16.i[916,929] [2023-11-26 11:55:32,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:32,291 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:55:32,291 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32 WrapperNode [2023-11-26 11:55:32,292 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:32,293 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:32,293 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:55:32,293 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:55:32,301 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,322 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,409 INFO L138 Inliner]: procedures = 26, calls = 87, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 574 [2023-11-26 11:55:32,410 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:32,411 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:55:32,411 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:55:32,412 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:55:32,424 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,424 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,444 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,519 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:55:32,528 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,529 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,562 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,568 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,581 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,587 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,604 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:55:32,605 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:55:32,608 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:55:32,608 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:55:32,609 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:32,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:32,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:55:32,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:55:32,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:55:32,694 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:55:32,695 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:55:32,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:55:32,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:55:32,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:55:32,866 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:55:32,869 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:55:33,658 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:55:33,713 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:55:33,713 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:55:33,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:33 BoogieIcfgContainer [2023-11-26 11:55:33,714 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:55:33,716 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:55:33,757 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:55:33,760 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:55:33,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:55:31" (1/3) ... [2023-11-26 11:55:33,761 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b598f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:33, skipping insertion in model container [2023-11-26 11:55:33,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (2/3) ... [2023-11-26 11:55:33,761 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b598f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:33, skipping insertion in model container [2023-11-26 11:55:33,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:33" (3/3) ... [2023-11-26 11:55:33,763 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-16.i [2023-11-26 11:55:33,785 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:55:33,785 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:55:33,861 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:55:33,869 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;@4380d71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:55:33,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:55:33,874 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) [2023-11-26 11:55:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-26 11:55:33,911 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:33,912 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] [2023-11-26 11:55:33,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:33,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:33,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1383171110, now seen corresponding path program 1 times [2023-11-26 11:55:33,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:33,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476683003] [2023-11-26 11:55:33,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:33,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:34,327 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:34,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363189767] [2023-11-26 11:55:34,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:34,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:34,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:34,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:34,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:55:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:34,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:55:34,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-26 11:55:35,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:35,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:35,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476683003] [2023-11-26 11:55:35,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:35,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363189767] [2023-11-26 11:55:35,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363189767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:35,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:35,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:55:35,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102220346] [2023-11-26 11:55:35,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:35,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:55:35,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:35,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:55:35,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:55:35,140 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) [2023-11-26 11:55:35,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:35,614 INFO L93 Difference]: Finished difference Result 697 states and 1346 transitions. [2023-11-26 11:55:35,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:55:35,617 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 [2023-11-26 11:55:35,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:35,650 INFO L225 Difference]: With dead ends: 697 [2023-11-26 11:55:35,651 INFO L226 Difference]: Without dead ends: 483 [2023-11-26 11:55:35,659 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 [2023-11-26 11:55:35,663 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, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:35,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 1872 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:55:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-11-26 11:55:35,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 363. [2023-11-26 11:55:35,804 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) [2023-11-26 11:55:35,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 631 transitions. [2023-11-26 11:55:35,814 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 631 transitions. Word has length 463 [2023-11-26 11:55:35,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:35,819 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 631 transitions. [2023-11-26 11:55:35,820 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) [2023-11-26 11:55:35,820 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 631 transitions. [2023-11-26 11:55:35,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-26 11:55:35,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:35,843 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] [2023-11-26 11:55:35,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:36,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:36,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:36,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:36,055 INFO L85 PathProgramCache]: Analyzing trace with hash 2018309848, now seen corresponding path program 1 times [2023-11-26 11:55:36,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:36,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181934221] [2023-11-26 11:55:36,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:36,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:36,263 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:36,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674749987] [2023-11-26 11:55:36,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:36,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:36,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:36,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:36,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:55:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:36,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:55:36,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-26 11:55:36,706 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:36,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:36,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181934221] [2023-11-26 11:55:36,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:36,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674749987] [2023-11-26 11:55:36,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674749987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:36,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:36,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:55:36,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320352320] [2023-11-26 11:55:36,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:36,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:55:36,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:36,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:55:36,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:55:36,712 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) [2023-11-26 11:55:36,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:36,819 INFO L93 Difference]: Finished difference Result 980 states and 1687 transitions. [2023-11-26 11:55:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:55:36,820 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 [2023-11-26 11:55:36,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:36,832 INFO L225 Difference]: With dead ends: 980 [2023-11-26 11:55:36,832 INFO L226 Difference]: Without dead ends: 618 [2023-11-26 11:55:36,834 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 [2023-11-26 11:55:36,836 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 [2023-11-26 11:55:36,839 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] [2023-11-26 11:55:36,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2023-11-26 11:55:36,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 615. [2023-11-26 11:55:36,945 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) [2023-11-26 11:55:36,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1053 transitions. [2023-11-26 11:55:36,951 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1053 transitions. Word has length 463 [2023-11-26 11:55:36,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:36,953 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 1053 transitions. [2023-11-26 11:55:36,953 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) [2023-11-26 11:55:36,954 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1053 transitions. [2023-11-26 11:55:36,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-26 11:55:36,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:36,964 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] [2023-11-26 11:55:36,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:37,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:37,172 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:37,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:37,173 INFO L85 PathProgramCache]: Analyzing trace with hash -890454054, now seen corresponding path program 1 times [2023-11-26 11:55:37,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:37,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479161298] [2023-11-26 11:55:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:37,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:37,258 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:37,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397518846] [2023-11-26 11:55:37,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:37,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:37,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:37,260 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:37,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:55:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:37,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:55:37,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-26 11:55:37,673 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:37,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:37,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479161298] [2023-11-26 11:55:37,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:37,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397518846] [2023-11-26 11:55:37,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397518846] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:37,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:37,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:55:37,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952636851] [2023-11-26 11:55:37,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:37,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:55:37,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:37,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:55:37,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:55:37,681 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) [2023-11-26 11:55:37,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:37,815 INFO L93 Difference]: Finished difference Result 1719 states and 2916 transitions. [2023-11-26 11:55:37,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:55:37,816 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 [2023-11-26 11:55:37,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:37,827 INFO L225 Difference]: With dead ends: 1719 [2023-11-26 11:55:37,827 INFO L226 Difference]: Without dead ends: 1105 [2023-11-26 11:55:37,830 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 [2023-11-26 11:55:37,831 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 [2023-11-26 11:55:37,832 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] [2023-11-26 11:55:37,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2023-11-26 11:55:37,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1102. [2023-11-26 11:55:37,962 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) [2023-11-26 11:55:37,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1858 transitions. [2023-11-26 11:55:37,973 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1858 transitions. Word has length 463 [2023-11-26 11:55:37,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:37,974 INFO L495 AbstractCegarLoop]: Abstraction has 1102 states and 1858 transitions. [2023-11-26 11:55:37,975 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) [2023-11-26 11:55:37,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1858 transitions. [2023-11-26 11:55:37,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-26 11:55:37,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:37,981 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] [2023-11-26 11:55:37,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:38,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:38,190 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:38,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:38,190 INFO L85 PathProgramCache]: Analyzing trace with hash -467752228, now seen corresponding path program 1 times [2023-11-26 11:55:38,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:38,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787997751] [2023-11-26 11:55:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:38,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:38,284 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:38,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934896954] [2023-11-26 11:55:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:38,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:38,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:38,286 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:38,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:55:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:38,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:55:38,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 3993 proven. 51 refuted. 0 times theorem prover too weak. 6760 trivial. 0 not checked. [2023-11-26 11:55:38,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 168 proven. 51 refuted. 0 times theorem prover too weak. 10585 trivial. 0 not checked. [2023-11-26 11:55:39,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:39,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787997751] [2023-11-26 11:55:39,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:39,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934896954] [2023-11-26 11:55:39,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934896954] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:39,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:55:39,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:55:39,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974705507] [2023-11-26 11:55:39,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:39,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:55:39,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:39,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:55:39,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:55:39,288 INFO L87 Difference]: Start difference. First operand 1102 states and 1858 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) [2023-11-26 11:55:40,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:40,200 INFO L93 Difference]: Finished difference Result 1829 states and 3070 transitions. [2023-11-26 11:55:40,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:55:40,201 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 [2023-11-26 11:55:40,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:40,208 INFO L225 Difference]: With dead ends: 1829 [2023-11-26 11:55:40,208 INFO L226 Difference]: Without dead ends: 728 [2023-11-26 11:55:40,213 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 [2023-11-26 11:55:40,214 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 428 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:40,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 811 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:55:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2023-11-26 11:55:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 717. [2023-11-26 11:55:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 453 states have (on average 1.509933774834437) internal successors, (684), 457 states have internal predecessors, (684), 256 states have call successors, (256), 7 states have call predecessors, (256), 7 states have return successors, (256), 252 states have call predecessors, (256), 256 states have call successors, (256) [2023-11-26 11:55:40,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1196 transitions. [2023-11-26 11:55:40,307 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1196 transitions. Word has length 463 [2023-11-26 11:55:40,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:40,308 INFO L495 AbstractCegarLoop]: Abstraction has 717 states and 1196 transitions. [2023-11-26 11:55:40,309 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) [2023-11-26 11:55:40,309 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1196 transitions. [2023-11-26 11:55:40,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-26 11:55:40,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:40,314 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] [2023-11-26 11:55:40,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:40,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:40,523 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:40,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:40,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1736609569, now seen corresponding path program 1 times [2023-11-26 11:55:40,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:40,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133517148] [2023-11-26 11:55:40,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:40,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:40,645 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:40,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913695255] [2023-11-26 11:55:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:40,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:40,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:40,647 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:40,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:55:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:41,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:55:41,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-26 11:55:41,082 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:41,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:41,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133517148] [2023-11-26 11:55:41,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:41,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913695255] [2023-11-26 11:55:41,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913695255] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:41,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:41,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:55:41,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658151887] [2023-11-26 11:55:41,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:41,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:55:41,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:41,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:55:41,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:55:41,086 INFO L87 Difference]: Start difference. First operand 717 states and 1196 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 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) [2023-11-26 11:55:41,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:41,328 INFO L93 Difference]: Finished difference Result 1704 states and 2784 transitions. [2023-11-26 11:55:41,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:55:41,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 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 464 [2023-11-26 11:55:41,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:41,339 INFO L225 Difference]: With dead ends: 1704 [2023-11-26 11:55:41,339 INFO L226 Difference]: Without dead ends: 1083 [2023-11-26 11:55:41,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:55:41,343 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 165 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:41,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1405 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:55:41,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2023-11-26 11:55:41,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 909. [2023-11-26 11:55:41,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 633 states have (on average 1.5165876777251184) internal successors, (960), 641 states have internal predecessors, (960), 264 states have call successors, (264), 11 states have call predecessors, (264), 11 states have return successors, (264), 256 states have call predecessors, (264), 264 states have call successors, (264) [2023-11-26 11:55:41,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1488 transitions. [2023-11-26 11:55:41,447 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1488 transitions. Word has length 464 [2023-11-26 11:55:41,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:41,448 INFO L495 AbstractCegarLoop]: Abstraction has 909 states and 1488 transitions. [2023-11-26 11:55:41,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 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) [2023-11-26 11:55:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1488 transitions. [2023-11-26 11:55:41,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-26 11:55:41,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:41,453 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] [2023-11-26 11:55:41,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:41,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:41,664 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:41,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:41,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1537289373, now seen corresponding path program 1 times [2023-11-26 11:55:41,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:41,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805278564] [2023-11-26 11:55:41,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:41,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:41,736 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:41,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095337419] [2023-11-26 11:55:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:41,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:41,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:41,738 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:41,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:55:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:42,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:55:42,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-26 11:55:42,157 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:42,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:42,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805278564] [2023-11-26 11:55:42,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:42,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095337419] [2023-11-26 11:55:42,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095337419] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:42,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:42,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:55:42,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279690279] [2023-11-26 11:55:42,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:42,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:55:42,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:42,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:55:42,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:55:42,162 INFO L87 Difference]: Start difference. First operand 909 states and 1488 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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) [2023-11-26 11:55:42,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:42,420 INFO L93 Difference]: Finished difference Result 1984 states and 3192 transitions. [2023-11-26 11:55:42,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:55:42,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 464 [2023-11-26 11:55:42,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:42,431 INFO L225 Difference]: With dead ends: 1984 [2023-11-26 11:55:42,431 INFO L226 Difference]: Without dead ends: 1171 [2023-11-26 11:55:42,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:55:42,435 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 209 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1796 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 [2023-11-26 11:55:42,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1796 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:55:42,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2023-11-26 11:55:42,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1105. [2023-11-26 11:55:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 805 states have (on average 1.5055900621118012) internal successors, (1212), 817 states have internal predecessors, (1212), 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) [2023-11-26 11:55:42,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1772 transitions. [2023-11-26 11:55:42,548 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1772 transitions. Word has length 464 [2023-11-26 11:55:42,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:42,549 INFO L495 AbstractCegarLoop]: Abstraction has 1105 states and 1772 transitions. [2023-11-26 11:55:42,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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) [2023-11-26 11:55:42,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1772 transitions. [2023-11-26 11:55:42,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-26 11:55:42,554 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:42,555 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] [2023-11-26 11:55:42,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:42,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:55:42,763 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:42,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:42,764 INFO L85 PathProgramCache]: Analyzing trace with hash -2056613345, now seen corresponding path program 1 times [2023-11-26 11:55:42,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:42,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413168062] [2023-11-26 11:55:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:42,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:42,841 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:42,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276073000] [2023-11-26 11:55:42,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:42,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:42,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:42,843 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:42,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:55:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:43,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:55:43,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-26 11:55:43,553 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:43,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:43,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413168062] [2023-11-26 11:55:43,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:43,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276073000] [2023-11-26 11:55:43,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276073000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:43,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:43,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:55:43,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892199684] [2023-11-26 11:55:43,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:43,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:55:43,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:43,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:55:43,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:55:43,559 INFO L87 Difference]: Start difference. First operand 1105 states and 1772 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 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) [2023-11-26 11:55:43,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:43,983 INFO L93 Difference]: Finished difference Result 2676 states and 4264 transitions. [2023-11-26 11:55:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:55:43,984 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 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 464 [2023-11-26 11:55:43,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:43,996 INFO L225 Difference]: With dead ends: 2676 [2023-11-26 11:55:43,996 INFO L226 Difference]: Without dead ends: 1667 [2023-11-26 11:55:44,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:55:44,001 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 207 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1748 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 [2023-11-26 11:55:44,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1748 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:55:44,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2023-11-26 11:55:44,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1337. [2023-11-26 11:55:44,101 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) [2023-11-26 11:55:44,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 2144 transitions. [2023-11-26 11:55:44,111 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 2144 transitions. Word has length 464 [2023-11-26 11:55:44,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:44,112 INFO L495 AbstractCegarLoop]: Abstraction has 1337 states and 2144 transitions. [2023-11-26 11:55:44,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 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) [2023-11-26 11:55:44,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 2144 transitions. [2023-11-26 11:55:44,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-26 11:55:44,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:44,119 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] [2023-11-26 11:55:44,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:44,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:55:44,327 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:44,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:44,328 INFO L85 PathProgramCache]: Analyzing trace with hash 970009825, now seen corresponding path program 1 times [2023-11-26 11:55:44,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:44,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228891330] [2023-11-26 11:55:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:44,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:44,388 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:44,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179747714] [2023-11-26 11:55:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:44,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:44,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:44,390 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:44,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:55:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:44,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 11:55:44,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 6795 proven. 216 refuted. 0 times theorem prover too weak. 3793 trivial. 0 not checked. [2023-11-26 11:55:46,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:51,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:51,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228891330] [2023-11-26 11:55:51,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:51,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179747714] [2023-11-26 11:55:51,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179747714] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:51,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:55:51,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-26 11:55:51,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782164556] [2023-11-26 11:55:51,064 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:51,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:55:51,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:51,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:55:51,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:55:51,067 INFO L87 Difference]: Start difference. First operand 1337 states and 2144 transitions. Second operand has 18 states, 18 states have (on average 6.388888888888889) internal successors, (115), 17 states have internal predecessors, (115), 5 states have call successors, (74), 5 states have call predecessors, (74), 7 states have return successors, (74), 5 states have call predecessors, (74), 5 states have call successors, (74) [2023-11-26 11:55:54,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:54,770 INFO L93 Difference]: Finished difference Result 6871 states and 10812 transitions. [2023-11-26 11:55:54,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-26 11:55:54,771 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.388888888888889) internal successors, (115), 17 states have internal predecessors, (115), 5 states have call successors, (74), 5 states have call predecessors, (74), 7 states have return successors, (74), 5 states have call predecessors, (74), 5 states have call successors, (74) Word has length 464 [2023-11-26 11:55:54,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:54,807 INFO L225 Difference]: With dead ends: 6871 [2023-11-26 11:55:54,808 INFO L226 Difference]: Without dead ends: 5630 [2023-11-26 11:55:54,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=575, Invalid=1777, Unknown=0, NotChecked=0, Total=2352 [2023-11-26 11:55:54,814 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 1549 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1653 SdHoareTripleChecker+Valid, 1669 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:54,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1653 Valid, 1669 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-26 11:55:54,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5630 states. [2023-11-26 11:55:55,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5630 to 5486. [2023-11-26 11:55:55,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5486 states, 4502 states have (on average 1.5302087960906263) internal successors, (6889), 4562 states have internal predecessors, (6889), 888 states have call successors, (888), 95 states have call predecessors, (888), 95 states have return successors, (888), 828 states have call predecessors, (888), 888 states have call successors, (888) [2023-11-26 11:55:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 8665 transitions. [2023-11-26 11:55:55,431 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 8665 transitions. Word has length 464 [2023-11-26 11:55:55,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:55,432 INFO L495 AbstractCegarLoop]: Abstraction has 5486 states and 8665 transitions. [2023-11-26 11:55:55,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.388888888888889) internal successors, (115), 17 states have internal predecessors, (115), 5 states have call successors, (74), 5 states have call predecessors, (74), 7 states have return successors, (74), 5 states have call predecessors, (74), 5 states have call successors, (74) [2023-11-26 11:55:55,433 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 8665 transitions. [2023-11-26 11:55:55,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-26 11:55:55,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:55,444 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] [2023-11-26 11:55:55,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-26 11:55:55,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:55,658 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:55,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:55,659 INFO L85 PathProgramCache]: Analyzing trace with hash 992642079, now seen corresponding path program 1 times [2023-11-26 11:55:55,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:55,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627362405] [2023-11-26 11:55:55,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:55,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:55,734 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:55,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661028818] [2023-11-26 11:55:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:55,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:55,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:55,736 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:55,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc34391-19eb-4d01-8903-b315b4d82cc8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:55:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:56,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-26 11:55:56,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 6985 proven. 396 refuted. 0 times theorem prover too weak. 3423 trivial. 0 not checked. [2023-11-26 11:55:59,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 174 proven. 45 refuted. 0 times theorem prover too weak. 10585 trivial. 0 not checked. [2023-11-26 11:56:01,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:01,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627362405] [2023-11-26 11:56:01,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:01,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661028818] [2023-11-26 11:56:01,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661028818] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:01,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:56:01,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11] total 32 [2023-11-26 11:56:01,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003338660] [2023-11-26 11:56:01,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:01,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-26 11:56:01,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:01,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-26 11:56:01,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2023-11-26 11:56:01,105 INFO L87 Difference]: Start difference. First operand 5486 states and 8665 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)