./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-81.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/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_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-81.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/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_a395af21-390f-446f-a40f-398e91dff689/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 6e69db6b79c938e6e812d41f7858906e1e9aba1ae7dcdc76b88489ffb95cb274 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:51:36,571 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:51:36,694 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:51:36,706 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:51:36,707 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:51:36,745 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:51:36,746 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:51:36,746 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:51:36,748 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:51:36,753 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:51:36,753 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:51:36,755 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:51:36,755 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:51:36,757 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:51:36,758 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:51:36,758 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:51:36,759 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:51:36,760 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:51:36,760 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:51:36,761 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:51:36,761 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:51:36,762 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:51:36,762 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:51:36,763 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:51:36,764 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:51:36,764 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:51:36,765 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:51:36,766 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:51:36,766 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:51:36,767 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:51:36,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:51:36,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:51:36,769 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:51:36,770 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:51:36,770 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:51:36,770 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:51:36,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:51:36,771 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:51:36,771 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:51:36,772 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:51:36,772 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:51:36,772 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:51:36,773 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_a395af21-390f-446f-a40f-398e91dff689/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e69db6b79c938e6e812d41f7858906e1e9aba1ae7dcdc76b88489ffb95cb274 [2023-11-26 11:51:37,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:51:37,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:51:37,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:51:37,208 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:51:37,208 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:51:37,210 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-81.i [2023-11-26 11:51:40,503 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:51:40,796 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:51:40,797 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-81.i [2023-11-26 11:51:40,813 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/data/c8277b2ce/c7dbf91187eb4d309919f0847f332e54/FLAG27969656c [2023-11-26 11:51:40,828 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/data/c8277b2ce/c7dbf91187eb4d309919f0847f332e54 [2023-11-26 11:51:40,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:51:40,832 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:51:40,834 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:51:40,834 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:51:40,841 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:51:40,842 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:51:40" (1/1) ... [2023-11-26 11:51:40,844 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@285f3873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:40, skipping insertion in model container [2023-11-26 11:51:40,844 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:51:40" (1/1) ... [2023-11-26 11:51:40,900 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:51:41,080 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_a395af21-390f-446f-a40f-398e91dff689/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-81.i[916,929] [2023-11-26 11:51:41,317 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:51:41,349 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:51:41,362 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_a395af21-390f-446f-a40f-398e91dff689/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-81.i[916,929] [2023-11-26 11:51:41,536 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:51:41,565 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:51:41,566 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:41 WrapperNode [2023-11-26 11:51:41,566 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:51:41,567 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:51:41,567 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:51:41,567 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:51:41,575 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:41" (1/1) ... [2023-11-26 11:51:41,605 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:41" (1/1) ... [2023-11-26 11:51:41,737 INFO L138 Inliner]: procedures = 26, calls = 122, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 818 [2023-11-26 11:51:41,737 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:51:41,738 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:51:41,738 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:51:41,738 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:51:41,750 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:41" (1/1) ... [2023-11-26 11:51:41,750 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:41" (1/1) ... [2023-11-26 11:51:41,769 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:41" (1/1) ... [2023-11-26 11:51:41,821 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 11:51:41,822 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:41" (1/1) ... [2023-11-26 11:51:41,822 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:41" (1/1) ... [2023-11-26 11:51:41,875 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:41" (1/1) ... [2023-11-26 11:51:41,882 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:41" (1/1) ... [2023-11-26 11:51:41,903 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:41" (1/1) ... [2023-11-26 11:51:41,916 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:41" (1/1) ... [2023-11-26 11:51:41,974 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:51:41,978 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:51:41,978 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:51:41,978 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:51:41,979 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:41" (1/1) ... [2023-11-26 11:51:41,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:51:41,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:42,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:51:42,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:51:42,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:51:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:51:42,057 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:51:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:51:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:51:42,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:51:42,246 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:51:42,249 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:51:43,624 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:51:43,679 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:51:43,679 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:51:43,680 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:51:43 BoogieIcfgContainer [2023-11-26 11:51:43,680 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:51:43,683 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:51:43,683 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:51:43,687 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:51:43,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:51:40" (1/3) ... [2023-11-26 11:51:43,688 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e823c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:51:43, skipping insertion in model container [2023-11-26 11:51:43,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:41" (2/3) ... [2023-11-26 11:51:43,689 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e823c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:51:43, skipping insertion in model container [2023-11-26 11:51:43,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:51:43" (3/3) ... [2023-11-26 11:51:43,690 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-81.i [2023-11-26 11:51:43,711 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:51:43,712 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:51:43,798 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:51:43,807 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;@2d1c81c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:51:43,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:51:43,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 321 states, 209 states have (on average 1.631578947368421) internal successors, (341), 210 states have internal predecessors, (341), 109 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2023-11-26 11:51:43,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2023-11-26 11:51:43,877 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:43,879 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:51:43,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:43,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:43,887 INFO L85 PathProgramCache]: Analyzing trace with hash -222307859, now seen corresponding path program 1 times [2023-11-26 11:51:43,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:43,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619945070] [2023-11-26 11:51:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:43,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:44,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:44,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619945070] [2023-11-26 11:51:44,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:51:44,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788382984] [2023-11-26 11:51:44,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:44,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:44,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:44,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:44,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:51:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:44,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:51:45,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 23328 trivial. 0 not checked. [2023-11-26 11:51:45,105 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:45,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788382984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:45,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:45,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:51:45,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338954762] [2023-11-26 11:51:45,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:45,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:51:45,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:45,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:51:45,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:51:45,178 INFO L87 Difference]: Start difference. First operand has 321 states, 209 states have (on average 1.631578947368421) internal successors, (341), 210 states have internal predecessors, (341), 109 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) Second operand has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (109), 2 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 2 states have call successors, (109) [2023-11-26 11:51:45,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:45,313 INFO L93 Difference]: Finished difference Result 639 states and 1225 transitions. [2023-11-26 11:51:45,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:51:45,318 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (109), 2 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 2 states have call successors, (109) Word has length 686 [2023-11-26 11:51:45,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:45,336 INFO L225 Difference]: With dead ends: 639 [2023-11-26 11:51:45,336 INFO L226 Difference]: Without dead ends: 319 [2023-11-26 11:51:45,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 685 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:51:45,352 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:45,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 549 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:51:45,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-11-26 11:51:45,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2023-11-26 11:51:45,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 208 states have (on average 1.6057692307692308) internal successors, (334), 208 states have internal predecessors, (334), 109 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2023-11-26 11:51:45,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 552 transitions. [2023-11-26 11:51:45,515 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 552 transitions. Word has length 686 [2023-11-26 11:51:45,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:45,517 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 552 transitions. [2023-11-26 11:51:45,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (109), 2 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 2 states have call successors, (109) [2023-11-26 11:51:45,518 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 552 transitions. [2023-11-26 11:51:45,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2023-11-26 11:51:45,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:45,551 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:51:45,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:45,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:51:45,766 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:45,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:45,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1429975595, now seen corresponding path program 1 times [2023-11-26 11:51:45,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:45,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49440277] [2023-11-26 11:51:45,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:45,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:46,009 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:46,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516728384] [2023-11-26 11:51:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:46,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:46,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:46,020 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:46,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:51:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:46,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 1544 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:51:46,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-26 11:51:46,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:46,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:46,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49440277] [2023-11-26 11:51:46,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:46,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516728384] [2023-11-26 11:51:46,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516728384] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:46,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:46,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:51:46,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427214538] [2023-11-26 11:51:46,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:46,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:46,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:46,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:46,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:46,638 INFO L87 Difference]: Start difference. First operand 319 states and 552 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-26 11:51:46,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:46,730 INFO L93 Difference]: Finished difference Result 820 states and 1433 transitions. [2023-11-26 11:51:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:46,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 687 [2023-11-26 11:51:46,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:46,741 INFO L225 Difference]: With dead ends: 820 [2023-11-26 11:51:46,741 INFO L226 Difference]: Without dead ends: 502 [2023-11-26 11:51:46,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 685 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 11:51:46,744 INFO L413 NwaCegarLoop]: 541 mSDtfsCounter, 321 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:46,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1073 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:51:46,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2023-11-26 11:51:46,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 499. [2023-11-26 11:51:46,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 361 states have (on average 1.6759002770083102) internal successors, (605), 362 states have internal predecessors, (605), 135 states have call successors, (135), 2 states have call predecessors, (135), 2 states have return successors, (135), 134 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-26 11:51:46,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 875 transitions. [2023-11-26 11:51:46,815 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 875 transitions. Word has length 687 [2023-11-26 11:51:46,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:46,818 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 875 transitions. [2023-11-26 11:51:46,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-26 11:51:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 875 transitions. [2023-11-26 11:51:46,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2023-11-26 11:51:46,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:46,828 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:51:46,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:47,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:47,036 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:47,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:47,037 INFO L85 PathProgramCache]: Analyzing trace with hash -727671339, now seen corresponding path program 1 times [2023-11-26 11:51:47,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:47,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917183067] [2023-11-26 11:51:47,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:47,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:47,139 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:47,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70883344] [2023-11-26 11:51:47,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:47,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:47,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:47,143 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:47,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:51:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:47,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 1544 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:51:47,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-26 11:51:47,705 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:47,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:47,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917183067] [2023-11-26 11:51:47,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:47,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70883344] [2023-11-26 11:51:47,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70883344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:47,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:47,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:51:47,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194659472] [2023-11-26 11:51:47,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:47,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:47,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:47,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:47,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:47,711 INFO L87 Difference]: Start difference. First operand 499 states and 875 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-26 11:51:47,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:47,791 INFO L93 Difference]: Finished difference Result 1489 states and 2611 transitions. [2023-11-26 11:51:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:47,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 687 [2023-11-26 11:51:47,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:47,803 INFO L225 Difference]: With dead ends: 1489 [2023-11-26 11:51:47,804 INFO L226 Difference]: Without dead ends: 991 [2023-11-26 11:51:47,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 685 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 11:51:47,807 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 521 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:47,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 1086 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:51:47,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2023-11-26 11:51:47,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 989. [2023-11-26 11:51:47,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 714 states have (on average 1.669467787114846) internal successors, (1192), 716 states have internal predecessors, (1192), 270 states have call successors, (270), 4 states have call predecessors, (270), 4 states have return successors, (270), 268 states have call predecessors, (270), 270 states have call successors, (270) [2023-11-26 11:51:48,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1732 transitions. [2023-11-26 11:51:48,006 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1732 transitions. Word has length 687 [2023-11-26 11:51:48,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:48,007 INFO L495 AbstractCegarLoop]: Abstraction has 989 states and 1732 transitions. [2023-11-26 11:51:48,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-26 11:51:48,008 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1732 transitions. [2023-11-26 11:51:48,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2023-11-26 11:51:48,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:48,017 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:51:48,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:48,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:48,231 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:48,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:48,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1757030637, now seen corresponding path program 1 times [2023-11-26 11:51:48,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:48,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399054473] [2023-11-26 11:51:48,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:48,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:48,334 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:48,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452359314] [2023-11-26 11:51:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:48,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:48,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:48,337 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:48,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:51:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:48,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 1543 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:51:48,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 10320 proven. 102 refuted. 0 times theorem prover too weak. 13122 trivial. 0 not checked. [2023-11-26 11:51:49,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 222 proven. 102 refuted. 0 times theorem prover too weak. 23220 trivial. 0 not checked. [2023-11-26 11:51:49,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:49,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399054473] [2023-11-26 11:51:49,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:49,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452359314] [2023-11-26 11:51:49,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452359314] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:49,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:51:49,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:51:49,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523405688] [2023-11-26 11:51:49,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:49,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:51:49,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:49,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:51:49,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:51:49,956 INFO L87 Difference]: Start difference. First operand 989 states and 1732 transitions. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (143), 2 states have call predecessors, (143), 4 states have return successors, (144), 2 states have call predecessors, (144), 2 states have call successors, (144) [2023-11-26 11:51:50,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:50,742 INFO L93 Difference]: Finished difference Result 1993 states and 3477 transitions. [2023-11-26 11:51:50,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:51:50,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (143), 2 states have call predecessors, (143), 4 states have return successors, (144), 2 states have call predecessors, (144), 2 states have call successors, (144) Word has length 687 [2023-11-26 11:51:50,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:50,752 INFO L225 Difference]: With dead ends: 1993 [2023-11-26 11:51:50,753 INFO L226 Difference]: Without dead ends: 1005 [2023-11-26 11:51:50,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1376 GetRequests, 1366 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:51:50,759 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 334 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:50,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 1062 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:51:50,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2023-11-26 11:51:50,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 997. [2023-11-26 11:51:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 720 states have (on average 1.6527777777777777) internal successors, (1190), 722 states have internal predecessors, (1190), 270 states have call successors, (270), 6 states have call predecessors, (270), 6 states have return successors, (270), 268 states have call predecessors, (270), 270 states have call successors, (270) [2023-11-26 11:51:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1730 transitions. [2023-11-26 11:51:50,947 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1730 transitions. Word has length 687 [2023-11-26 11:51:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:50,950 INFO L495 AbstractCegarLoop]: Abstraction has 997 states and 1730 transitions. [2023-11-26 11:51:50,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (143), 2 states have call predecessors, (143), 4 states have return successors, (144), 2 states have call predecessors, (144), 2 states have call successors, (144) [2023-11-26 11:51:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1730 transitions. [2023-11-26 11:51:50,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2023-11-26 11:51:50,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:50,959 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:51:50,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:51,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:51,169 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:51,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:51,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1392994379, now seen corresponding path program 1 times [2023-11-26 11:51:51,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:51,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380740011] [2023-11-26 11:51:51,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:51,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:51,272 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:51,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823285196] [2023-11-26 11:51:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:51,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:51,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:51,274 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:51,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:51:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:51,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 1549 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:51:51,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23544 trivial. 0 not checked. [2023-11-26 11:51:52,940 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:52,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:52,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380740011] [2023-11-26 11:51:52,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:52,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823285196] [2023-11-26 11:51:52,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823285196] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:52,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:52,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:51:52,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748731534] [2023-11-26 11:51:52,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:52,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:52,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:52,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:52,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:52,951 INFO L87 Difference]: Start difference. First operand 997 states and 1730 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-26 11:51:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:53,601 INFO L93 Difference]: Finished difference Result 3352 states and 5811 transitions. [2023-11-26 11:51:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:51:53,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 689 [2023-11-26 11:51:53,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:53,623 INFO L225 Difference]: With dead ends: 3352 [2023-11-26 11:51:53,623 INFO L226 Difference]: Without dead ends: 2356 [2023-11-26 11:51:53,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 686 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:53,630 INFO L413 NwaCegarLoop]: 542 mSDtfsCounter, 773 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1391 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:53,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 1391 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:51:53,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2023-11-26 11:51:54,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2351. [2023-11-26 11:51:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 1696 states have (on average 1.6444575471698113) internal successors, (2789), 1702 states have internal predecessors, (2789), 640 states have call successors, (640), 14 states have call predecessors, (640), 14 states have return successors, (640), 634 states have call predecessors, (640), 640 states have call successors, (640) [2023-11-26 11:51:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 4069 transitions. [2023-11-26 11:51:54,222 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 4069 transitions. Word has length 689 [2023-11-26 11:51:54,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:54,224 INFO L495 AbstractCegarLoop]: Abstraction has 2351 states and 4069 transitions. [2023-11-26 11:51:54,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (109), 1 states have call predecessors, (109), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2023-11-26 11:51:54,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 4069 transitions. [2023-11-26 11:51:54,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2023-11-26 11:51:54,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:54,235 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:51:54,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:54,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:54,444 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:54,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:54,445 INFO L85 PathProgramCache]: Analyzing trace with hash -546167667, now seen corresponding path program 1 times [2023-11-26 11:51:54,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:54,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502119663] [2023-11-26 11:51:54,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:54,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:54,536 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:54,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039079048] [2023-11-26 11:51:54,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:54,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:54,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:54,539 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:54,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:51:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:55,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:51:55,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 11868 proven. 156 refuted. 0 times theorem prover too weak. 11520 trivial. 0 not checked. [2023-11-26 11:51:55,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 168 proven. 156 refuted. 0 times theorem prover too weak. 23220 trivial. 0 not checked. [2023-11-26 11:51:56,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:56,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502119663] [2023-11-26 11:51:56,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:56,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039079048] [2023-11-26 11:51:56,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039079048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:56,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:51:56,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-26 11:51:56,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178649744] [2023-11-26 11:51:56,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:56,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:51:56,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:56,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:51:56,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:51:56,207 INFO L87 Difference]: Start difference. First operand 2351 states and 4069 transitions. Second operand has 10 states, 10 states have (on average 20.9) internal successors, (209), 10 states have internal predecessors, (209), 3 states have call successors, (161), 2 states have call predecessors, (161), 4 states have return successors, (162), 3 states have call predecessors, (162), 3 states have call successors, (162) [2023-11-26 11:51:57,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:57,465 INFO L93 Difference]: Finished difference Result 4751 states and 8192 transitions. [2023-11-26 11:51:57,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:51:57,469 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.9) internal successors, (209), 10 states have internal predecessors, (209), 3 states have call successors, (161), 2 states have call predecessors, (161), 4 states have return successors, (162), 3 states have call predecessors, (162), 3 states have call successors, (162) Word has length 689 [2023-11-26 11:51:57,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:57,488 INFO L225 Difference]: With dead ends: 4751 [2023-11-26 11:51:57,488 INFO L226 Difference]: Without dead ends: 2401 [2023-11-26 11:51:57,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1381 GetRequests, 1368 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:51:57,497 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 611 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:57,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 1370 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:51:57,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2023-11-26 11:51:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 2371. [2023-11-26 11:51:58,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 1711 states have (on average 1.6329631794272355) internal successors, (2794), 1717 states have internal predecessors, (2794), 640 states have call successors, (640), 19 states have call predecessors, (640), 19 states have return successors, (640), 634 states have call predecessors, (640), 640 states have call successors, (640) [2023-11-26 11:51:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 4074 transitions. [2023-11-26 11:51:58,020 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 4074 transitions. Word has length 689 [2023-11-26 11:51:58,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:58,021 INFO L495 AbstractCegarLoop]: Abstraction has 2371 states and 4074 transitions. [2023-11-26 11:51:58,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.9) internal successors, (209), 10 states have internal predecessors, (209), 3 states have call successors, (161), 2 states have call predecessors, (161), 4 states have return successors, (162), 3 states have call predecessors, (162), 3 states have call successors, (162) [2023-11-26 11:51:58,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 4074 transitions. [2023-11-26 11:51:58,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2023-11-26 11:51:58,031 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:58,032 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:51:58,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:58,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:51:58,241 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:58,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:58,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1828929587, now seen corresponding path program 1 times [2023-11-26 11:51:58,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:58,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501453002] [2023-11-26 11:51:58,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:58,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:58,326 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:58,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770925795] [2023-11-26 11:51:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:58,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:58,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:58,327 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:58,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:51:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:58,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 1549 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:51:58,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 11838 proven. 171 refuted. 0 times theorem prover too weak. 11535 trivial. 0 not checked. [2023-11-26 11:51:59,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 23220 trivial. 0 not checked. [2023-11-26 11:51:59,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:59,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501453002] [2023-11-26 11:51:59,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:59,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770925795] [2023-11-26 11:51:59,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770925795] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:59,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:51:59,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:51:59,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405779280] [2023-11-26 11:51:59,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:59,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:51:59,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:59,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:51:59,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:51:59,900 INFO L87 Difference]: Start difference. First operand 2371 states and 4074 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (166), 2 states have call predecessors, (166), 4 states have return successors, (167), 2 states have call predecessors, (167), 2 states have call successors, (167) [2023-11-26 11:52:00,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:00,826 INFO L93 Difference]: Finished difference Result 4791 states and 8192 transitions. [2023-11-26 11:52:00,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:52:00,827 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (166), 2 states have call predecessors, (166), 4 states have return successors, (167), 2 states have call predecessors, (167), 2 states have call successors, (167) Word has length 690 [2023-11-26 11:52:00,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:00,852 INFO L225 Difference]: With dead ends: 4791 [2023-11-26 11:52:00,852 INFO L226 Difference]: Without dead ends: 2421 [2023-11-26 11:52:00,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1382 GetRequests, 1372 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:52:00,863 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 326 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:00,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 1063 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:52:00,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2023-11-26 11:52:01,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 2391. [2023-11-26 11:52:01,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 1726 states have (on average 1.6216685979142527) internal successors, (2799), 1732 states have internal predecessors, (2799), 640 states have call successors, (640), 24 states have call predecessors, (640), 24 states have return successors, (640), 634 states have call predecessors, (640), 640 states have call successors, (640) [2023-11-26 11:52:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 4079 transitions. [2023-11-26 11:52:01,257 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 4079 transitions. Word has length 690 [2023-11-26 11:52:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:01,259 INFO L495 AbstractCegarLoop]: Abstraction has 2391 states and 4079 transitions. [2023-11-26 11:52:01,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (166), 2 states have call predecessors, (166), 4 states have return successors, (167), 2 states have call predecessors, (167), 2 states have call successors, (167) [2023-11-26 11:52:01,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 4079 transitions. [2023-11-26 11:52:01,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2023-11-26 11:52:01,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:01,270 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:52:01,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:01,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:52:01,481 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:01,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:01,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1905337931, now seen corresponding path program 1 times [2023-11-26 11:52:01,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:01,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863074158] [2023-11-26 11:52:01,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:01,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:01,583 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:01,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034385039] [2023-11-26 11:52:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:01,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:01,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:01,586 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:01,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:52:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:02,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:52:02,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 6180 proven. 48 refuted. 0 times theorem prover too weak. 17316 trivial. 0 not checked. [2023-11-26 11:52:02,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 276 proven. 48 refuted. 0 times theorem prover too weak. 23220 trivial. 0 not checked. [2023-11-26 11:52:02,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:02,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863074158] [2023-11-26 11:52:02,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:02,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034385039] [2023-11-26 11:52:02,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034385039] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:02,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:52:02,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:52:02,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640264627] [2023-11-26 11:52:02,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:02,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:52:02,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:02,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:52:02,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:52:02,798 INFO L87 Difference]: Start difference. First operand 2391 states and 4079 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 2 states have call predecessors, (126), 2 states have call successors, (126) [2023-11-26 11:52:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:03,742 INFO L93 Difference]: Finished difference Result 4835 states and 8207 transitions. [2023-11-26 11:52:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:52:03,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 2 states have call predecessors, (126), 2 states have call successors, (126) Word has length 690 [2023-11-26 11:52:03,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:03,763 INFO L225 Difference]: With dead ends: 4835 [2023-11-26 11:52:03,763 INFO L226 Difference]: Without dead ends: 2445 [2023-11-26 11:52:03,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1382 GetRequests, 1372 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:52:03,800 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 368 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:03,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1074 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:52:03,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2023-11-26 11:52:04,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2407. [2023-11-26 11:52:04,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 1738 states have (on average 1.6116225546605294) internal successors, (2801), 1744 states have internal predecessors, (2801), 640 states have call successors, (640), 28 states have call predecessors, (640), 28 states have return successors, (640), 634 states have call predecessors, (640), 640 states have call successors, (640) [2023-11-26 11:52:04,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 4081 transitions. [2023-11-26 11:52:04,112 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 4081 transitions. Word has length 690 [2023-11-26 11:52:04,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:04,114 INFO L495 AbstractCegarLoop]: Abstraction has 2407 states and 4081 transitions. [2023-11-26 11:52:04,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 2 states have call predecessors, (126), 2 states have call successors, (126) [2023-11-26 11:52:04,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 4081 transitions. [2023-11-26 11:52:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2023-11-26 11:52:04,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:04,124 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:52:04,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:04,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:52:04,336 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:04,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:04,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1245806409, now seen corresponding path program 1 times [2023-11-26 11:52:04,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:04,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793913395] [2023-11-26 11:52:04,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:04,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:04,428 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:04,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327120759] [2023-11-26 11:52:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:04,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:04,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:04,431 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:04,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:52:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:04,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 1549 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:52:04,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 3764 proven. 615 refuted. 0 times theorem prover too weak. 19165 trivial. 0 not checked. [2023-11-26 11:52:08,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 27 proven. 618 refuted. 0 times theorem prover too weak. 22899 trivial. 0 not checked. [2023-11-26 11:52:09,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:09,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793913395] [2023-11-26 11:52:09,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:09,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327120759] [2023-11-26 11:52:09,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327120759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:09,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:52:09,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-26 11:52:09,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995073998] [2023-11-26 11:52:09,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:09,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:52:09,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:09,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:52:09,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:52:09,429 INFO L87 Difference]: Start difference. First operand 2407 states and 4081 transitions. Second operand has 16 states, 16 states have (on average 18.9375) internal successors, (303), 16 states have internal predecessors, (303), 5 states have call successors, (217), 3 states have call predecessors, (217), 7 states have return successors, (218), 4 states have call predecessors, (218), 5 states have call successors, (218) [2023-11-26 11:52:11,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:11,195 INFO L93 Difference]: Finished difference Result 5735 states and 9391 transitions. [2023-11-26 11:52:11,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-26 11:52:11,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 18.9375) internal successors, (303), 16 states have internal predecessors, (303), 5 states have call successors, (217), 3 states have call predecessors, (217), 7 states have return successors, (218), 4 states have call predecessors, (218), 5 states have call successors, (218) Word has length 690 [2023-11-26 11:52:11,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:11,224 INFO L225 Difference]: With dead ends: 5735 [2023-11-26 11:52:11,225 INFO L226 Difference]: Without dead ends: 3329 [2023-11-26 11:52:11,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1400 GetRequests, 1367 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=356, Invalid=834, Unknown=0, NotChecked=0, Total=1190 [2023-11-26 11:52:11,236 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 744 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:11,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 1703 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:52:11,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3329 states. [2023-11-26 11:52:11,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3329 to 2877. [2023-11-26 11:52:11,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2068 states have (on average 1.543036750483559) internal successors, (3191), 2084 states have internal predecessors, (3191), 740 states have call successors, (740), 68 states have call predecessors, (740), 68 states have return successors, (740), 724 states have call predecessors, (740), 740 states have call successors, (740) [2023-11-26 11:52:11,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 4671 transitions. [2023-11-26 11:52:11,755 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 4671 transitions. Word has length 690 [2023-11-26 11:52:11,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:11,756 INFO L495 AbstractCegarLoop]: Abstraction has 2877 states and 4671 transitions. [2023-11-26 11:52:11,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 18.9375) internal successors, (303), 16 states have internal predecessors, (303), 5 states have call successors, (217), 3 states have call predecessors, (217), 7 states have return successors, (218), 4 states have call predecessors, (218), 5 states have call successors, (218) [2023-11-26 11:52:11,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 4671 transitions. [2023-11-26 11:52:11,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2023-11-26 11:52:11,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:11,769 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:52:11,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:11,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:11,979 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:11,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:11,980 INFO L85 PathProgramCache]: Analyzing trace with hash -310320290, now seen corresponding path program 1 times [2023-11-26 11:52:11,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:11,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329641549] [2023-11-26 11:52:11,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:11,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:12,053 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:12,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887680302] [2023-11-26 11:52:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:12,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:12,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:12,056 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:12,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:52:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:12,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 1553 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:52:12,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 10240 proven. 222 refuted. 0 times theorem prover too weak. 13082 trivial. 0 not checked. [2023-11-26 11:52:13,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:13,932 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 102 proven. 222 refuted. 0 times theorem prover too weak. 23220 trivial. 0 not checked. [2023-11-26 11:52:13,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:13,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329641549] [2023-11-26 11:52:13,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:13,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887680302] [2023-11-26 11:52:13,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887680302] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:13,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:52:13,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 11:52:13,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533852595] [2023-11-26 11:52:13,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:13,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:52:13,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:13,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:52:13,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:52:13,939 INFO L87 Difference]: Start difference. First operand 2877 states and 4671 transitions. Second operand has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 3 states have call successors, (183), 2 states have call predecessors, (183), 4 states have return successors, (184), 3 states have call predecessors, (184), 3 states have call successors, (184) [2023-11-26 11:52:15,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:15,001 INFO L93 Difference]: Finished difference Result 5841 states and 9424 transitions. [2023-11-26 11:52:15,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:52:15,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 3 states have call successors, (183), 2 states have call predecessors, (183), 4 states have return successors, (184), 3 states have call predecessors, (184), 3 states have call successors, (184) Word has length 691 [2023-11-26 11:52:15,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:15,025 INFO L225 Difference]: With dead ends: 5841 [2023-11-26 11:52:15,025 INFO L226 Difference]: Without dead ends: 2965 [2023-11-26 11:52:15,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1384 GetRequests, 1374 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:52:15,035 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 795 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:15,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 1006 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:52:15,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2023-11-26 11:52:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2897. [2023-11-26 11:52:15,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2897 states, 2083 states have (on average 1.5343254920787326) internal successors, (3196), 2099 states have internal predecessors, (3196), 740 states have call successors, (740), 73 states have call predecessors, (740), 73 states have return successors, (740), 724 states have call predecessors, (740), 740 states have call successors, (740) [2023-11-26 11:52:15,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 4676 transitions. [2023-11-26 11:52:15,512 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 4676 transitions. Word has length 691 [2023-11-26 11:52:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:15,514 INFO L495 AbstractCegarLoop]: Abstraction has 2897 states and 4676 transitions. [2023-11-26 11:52:15,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 3 states have call successors, (183), 2 states have call predecessors, (183), 4 states have return successors, (184), 3 states have call predecessors, (184), 3 states have call successors, (184) [2023-11-26 11:52:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 4676 transitions. [2023-11-26 11:52:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2023-11-26 11:52:15,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:15,530 INFO L195 NwaCegarLoop]: trace histogram [109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:52:15,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:15,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:15,740 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:15,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:15,741 INFO L85 PathProgramCache]: Analyzing trace with hash 123408796, now seen corresponding path program 1 times [2023-11-26 11:52:15,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:15,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941272976] [2023-11-26 11:52:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:15,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:15,831 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:15,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494029639] [2023-11-26 11:52:15,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:15,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:15,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:15,833 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:15,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a395af21-390f-446f-a40f-398e91dff689/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:52:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:16,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 1553 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:52:16,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 3324 proven. 300 refuted. 0 times theorem prover too weak. 19920 trivial. 0 not checked. [2023-11-26 11:52:17,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 23544 backedges. 24 proven. 300 refuted. 0 times theorem prover too weak. 23220 trivial. 0 not checked. [2023-11-26 11:52:18,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:18,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941272976] [2023-11-26 11:52:18,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:18,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494029639] [2023-11-26 11:52:18,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494029639] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:18,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:52:18,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-11-26 11:52:18,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908974065] [2023-11-26 11:52:18,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:18,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 11:52:18,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:18,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 11:52:18,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:52:18,308 INFO L87 Difference]: Start difference. First operand 2897 states and 4676 transitions. Second operand has 20 states, 20 states have (on average 14.65) internal successors, (293), 20 states have internal predecessors, (293), 3 states have call successors, (209), 2 states have call predecessors, (209), 4 states have return successors, (210), 3 states have call predecessors, (210), 3 states have call successors, (210)