./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-15.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-15.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 98852892099293c59e2ad737927aba8b385300b36be0324ca44f26f975bc4f12 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:33:00,614 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:33:00,707 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 21:33:00,712 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:33:00,713 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:33:00,738 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:33:00,739 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:33:00,739 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:33:00,740 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 21:33:00,740 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 21:33:00,741 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:33:00,742 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:33:00,742 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:33:00,743 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:33:00,743 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 21:33:00,744 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:33:00,745 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:33:00,745 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:33:00,746 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:33:00,746 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:33:00,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:33:00,748 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:33:00,748 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:33:00,749 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:33:00,749 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:33:00,750 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:33:00,750 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:33:00,751 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:33:00,751 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:33:00,752 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:33:00,753 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:33:00,753 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:33:00,754 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:33:00,754 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:33:00,755 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:33:00,755 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 21:33:00,756 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:33:00,756 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:33:00,756 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 21:33:00,757 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:33:00,757 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 21:33:00,758 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:33:00,758 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_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98852892099293c59e2ad737927aba8b385300b36be0324ca44f26f975bc4f12 [2023-11-23 21:33:01,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:33:01,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:33:01,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:33:01,152 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:33:01,153 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:33:01,154 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-15.i [2023-11-23 21:33:04,984 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:33:05,326 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:33:05,327 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-15.i [2023-11-23 21:33:05,342 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/data/d00cab5ec/3bd4f0a4bbde479aa93d2e50e08e8158/FLAGb37f525e9 [2023-11-23 21:33:05,361 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/data/d00cab5ec/3bd4f0a4bbde479aa93d2e50e08e8158 [2023-11-23 21:33:05,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:33:05,371 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:33:05,373 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:33:05,373 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:33:05,379 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:33:05,380 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:33:05" (1/1) ... [2023-11-23 21:33:05,382 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a092817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:05, skipping insertion in model container [2023-11-23 21:33:05,382 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:33:05" (1/1) ... [2023-11-23 21:33:05,469 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:33:05,689 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_da099569-cffc-4c2a-b8db-16138500e6aa/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-15.i[916,929] [2023-11-23 21:33:05,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:33:05,895 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:33:05,907 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_da099569-cffc-4c2a-b8db-16138500e6aa/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-15.i[916,929] [2023-11-23 21:33:06,004 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:33:06,037 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:33:06,038 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:06 WrapperNode [2023-11-23 21:33:06,038 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:33:06,039 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:33:06,040 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:33:06,040 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:33:06,047 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:06" (1/1) ... [2023-11-23 21:33:06,085 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:06" (1/1) ... [2023-11-23 21:33:06,184 INFO L138 Inliner]: procedures = 26, calls = 59, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 385 [2023-11-23 21:33:06,187 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:33:06,188 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:33:06,188 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:33:06,189 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:33:06,201 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:06" (1/1) ... [2023-11-23 21:33:06,202 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:06" (1/1) ... [2023-11-23 21:33:06,228 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:06" (1/1) ... [2023-11-23 21:33:06,287 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 21:33:06,287 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:06" (1/1) ... [2023-11-23 21:33:06,288 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:06" (1/1) ... [2023-11-23 21:33:06,343 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:06" (1/1) ... [2023-11-23 21:33:06,349 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:06" (1/1) ... [2023-11-23 21:33:06,371 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:06" (1/1) ... [2023-11-23 21:33:06,379 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:06" (1/1) ... [2023-11-23 21:33:06,405 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:33:06,406 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:33:06,407 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:33:06,407 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:33:06,408 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:06" (1/1) ... [2023-11-23 21:33:06,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:33:06,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:33:06,470 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:33:06,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:33:06,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:33:06,527 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:33:06,527 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:33:06,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 21:33:06,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:33:06,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:33:06,700 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:33:06,703 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:33:07,813 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:33:07,896 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:33:07,897 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:33:07,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:33:07 BoogieIcfgContainer [2023-11-23 21:33:07,898 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:33:07,900 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:33:07,901 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:33:07,905 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:33:07,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:33:05" (1/3) ... [2023-11-23 21:33:07,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e87bb30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:33:07, skipping insertion in model container [2023-11-23 21:33:07,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:06" (2/3) ... [2023-11-23 21:33:07,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e87bb30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:33:07, skipping insertion in model container [2023-11-23 21:33:07,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:33:07" (3/3) ... [2023-11-23 21:33:07,909 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-15.i [2023-11-23 21:33:07,936 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:33:07,936 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:33:08,034 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:33:08,043 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;@68934973, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:33:08,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:33:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 104 states have (on average 1.5384615384615385) internal successors, (160), 105 states have internal predecessors, (160), 46 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-23 21:33:08,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-11-23 21:33:08,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:33:08,078 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:33:08,079 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:33:08,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:33:08,088 INFO L85 PathProgramCache]: Analyzing trace with hash -862818390, now seen corresponding path program 1 times [2023-11-23 21:33:08,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:33:08,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101314171] [2023-11-23 21:33:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:33:08,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:33:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:33:08,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:33:08,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101314171] [2023-11-23 21:33:08,618 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 21:33:08,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736455368] [2023-11-23 21:33:08,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:33:08,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:33:08,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:33:08,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:33:08,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:33:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:33:09,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 21:33:09,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:33:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 4050 trivial. 0 not checked. [2023-11-23 21:33:09,152 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:33:09,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736455368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:33:09,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:33:09,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:33:09,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352868569] [2023-11-23 21:33:09,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:33:09,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:33:09,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:33:09,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:33:09,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:33:09,224 INFO L87 Difference]: Start difference. First operand has 153 states, 104 states have (on average 1.5384615384615385) internal successors, (160), 105 states have internal predecessors, (160), 46 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (46), 1 states have call predecessors, (46), 2 states have call successors, (46) [2023-11-23 21:33:09,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:33:09,346 INFO L93 Difference]: Finished difference Result 303 states and 548 transitions. [2023-11-23 21:33:09,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:33:09,351 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (46), 1 states have call predecessors, (46), 2 states have call successors, (46) Word has length 299 [2023-11-23 21:33:09,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:33:09,367 INFO L225 Difference]: With dead ends: 303 [2023-11-23 21:33:09,367 INFO L226 Difference]: Without dead ends: 151 [2023-11-23 21:33:09,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:33:09,379 INFO L413 NwaCegarLoop]: 244 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, 244 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:33:09,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 244 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:33:09,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-23 21:33:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2023-11-23 21:33:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 103 states have (on average 1.5048543689320388) internal successors, (155), 103 states have internal predecessors, (155), 46 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-23 21:33:09,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 247 transitions. [2023-11-23 21:33:09,516 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 247 transitions. Word has length 299 [2023-11-23 21:33:09,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:33:09,520 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 247 transitions. [2023-11-23 21:33:09,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (46), 1 states have call predecessors, (46), 2 states have call successors, (46) [2023-11-23 21:33:09,521 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 247 transitions. [2023-11-23 21:33:09,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-11-23 21:33:09,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:33:09,540 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:33:09,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:33:09,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 21:33:09,769 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:33:09,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:33:09,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1213431822, now seen corresponding path program 1 times [2023-11-23 21:33:09,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:33:09,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542952513] [2023-11-23 21:33:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:33:09,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:33:09,980 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:33:09,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065811085] [2023-11-23 21:33:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:33:09,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:33:09,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:33:09,990 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:33:10,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:33:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:33:10,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:33:10,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:33:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2023-11-23 21:33:10,538 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:33:10,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:33:10,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542952513] [2023-11-23 21:33:10,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:33:10,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065811085] [2023-11-23 21:33:10,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065811085] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:33:10,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:33:10,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:33:10,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689232013] [2023-11-23 21:33:10,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:33:10,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:33:10,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:33:10,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:33:10,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:33:10,553 INFO L87 Difference]: Start difference. First operand 151 states and 247 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 1 states have call predecessors, (46), 1 states have call successors, (46) [2023-11-23 21:33:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:33:10,737 INFO L93 Difference]: Finished difference Result 450 states and 737 transitions. [2023-11-23 21:33:10,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:33:10,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 1 states have call predecessors, (46), 1 states have call successors, (46) Word has length 299 [2023-11-23 21:33:10,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:33:10,749 INFO L225 Difference]: With dead ends: 450 [2023-11-23 21:33:10,749 INFO L226 Difference]: Without dead ends: 300 [2023-11-23 21:33:10,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:33:10,753 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 219 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:33:10,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 478 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:33:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2023-11-23 21:33:10,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 298. [2023-11-23 21:33:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 203 states have (on average 1.4926108374384237) internal successors, (303), 203 states have internal predecessors, (303), 92 states have call successors, (92), 2 states have call predecessors, (92), 2 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-23 21:33:10,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 487 transitions. [2023-11-23 21:33:10,907 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 487 transitions. Word has length 299 [2023-11-23 21:33:10,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:33:10,912 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 487 transitions. [2023-11-23 21:33:10,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (46), 1 states have call predecessors, (46), 1 states have return successors, (46), 1 states have call predecessors, (46), 1 states have call successors, (46) [2023-11-23 21:33:10,913 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 487 transitions. [2023-11-23 21:33:10,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-11-23 21:33:10,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:33:10,923 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:33:10,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:33:11,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-23 21:33:11,130 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:33:11,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:33:11,131 INFO L85 PathProgramCache]: Analyzing trace with hash -955266384, now seen corresponding path program 1 times [2023-11-23 21:33:11,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:33:11,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597581127] [2023-11-23 21:33:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:33:11,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:33:11,254 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:33:11,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418308934] [2023-11-23 21:33:11,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:33:11,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:33:11,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:33:11,261 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:33:11,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:33:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:33:11,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:33:11,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:33:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2085 proven. 75 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2023-11-23 21:33:12,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:33:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 60 proven. 75 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2023-11-23 21:33:13,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:33:13,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597581127] [2023-11-23 21:33:13,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:33:13,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418308934] [2023-11-23 21:33:13,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418308934] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:33:13,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:33:13,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-23 21:33:13,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133970743] [2023-11-23 21:33:13,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:33:13,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:33:13,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:33:13,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:33:13,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:33:13,479 INFO L87 Difference]: Start difference. First operand 298 states and 487 transitions. Second operand has 12 states, 12 states have (on average 12.0) internal successors, (144), 12 states have internal predecessors, (144), 4 states have call successors, (92), 3 states have call predecessors, (92), 5 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) [2023-11-23 21:33:15,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:33:15,746 INFO L93 Difference]: Finished difference Result 1619 states and 2608 transitions. [2023-11-23 21:33:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 21:33:15,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.0) internal successors, (144), 12 states have internal predecessors, (144), 4 states have call successors, (92), 3 states have call predecessors, (92), 5 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) Word has length 299 [2023-11-23 21:33:15,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:33:15,765 INFO L225 Difference]: With dead ends: 1619 [2023-11-23 21:33:15,766 INFO L226 Difference]: Without dead ends: 1322 [2023-11-23 21:33:15,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2023-11-23 21:33:15,772 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 1076 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 2036 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:33:15,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 2036 Invalid, 1749 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [345 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-23 21:33:15,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2023-11-23 21:33:16,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1288. [2023-11-23 21:33:16,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 867 states have (on average 1.4579008073817763) internal successors, (1264), 869 states have internal predecessors, (1264), 406 states have call successors, (406), 14 states have call predecessors, (406), 14 states have return successors, (406), 404 states have call predecessors, (406), 406 states have call successors, (406) [2023-11-23 21:33:16,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 2076 transitions. [2023-11-23 21:33:16,054 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 2076 transitions. Word has length 299 [2023-11-23 21:33:16,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:33:16,056 INFO L495 AbstractCegarLoop]: Abstraction has 1288 states and 2076 transitions. [2023-11-23 21:33:16,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.0) internal successors, (144), 12 states have internal predecessors, (144), 4 states have call successors, (92), 3 states have call predecessors, (92), 5 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) [2023-11-23 21:33:16,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 2076 transitions. [2023-11-23 21:33:16,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-11-23 21:33:16,061 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:33:16,062 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:33:16,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-23 21:33:16,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-23 21:33:16,284 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:33:16,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:33:16,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1984625682, now seen corresponding path program 1 times [2023-11-23 21:33:16,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:33:16,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582729447] [2023-11-23 21:33:16,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:33:16,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:33:16,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:33:16,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532046543] [2023-11-23 21:33:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:33:16,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:33:16,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:33:16,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:33:16,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:33:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:33:16,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:33:16,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:33:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2085 proven. 75 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2023-11-23 21:33:17,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:33:17,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 60 proven. 75 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2023-11-23 21:33:17,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:33:17,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582729447] [2023-11-23 21:33:17,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:33:17,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532046543] [2023-11-23 21:33:17,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532046543] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:33:17,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:33:17,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-23 21:33:17,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560371958] [2023-11-23 21:33:17,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:33:17,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:33:17,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:33:17,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:33:17,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:33:17,434 INFO L87 Difference]: Start difference. First operand 1288 states and 2076 transitions. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 2 states have call successors, (71), 2 states have call predecessors, (71), 4 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-23 21:33:18,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:33:18,991 INFO L93 Difference]: Finished difference Result 3312 states and 5291 transitions. [2023-11-23 21:33:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-23 21:33:18,992 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 2 states have call successors, (71), 2 states have call predecessors, (71), 4 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) Word has length 299 [2023-11-23 21:33:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:33:19,011 INFO L225 Difference]: With dead ends: 3312 [2023-11-23 21:33:19,012 INFO L226 Difference]: Without dead ends: 2025 [2023-11-23 21:33:19,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 590 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2023-11-23 21:33:19,020 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 802 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:33:19,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 1135 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 21:33:19,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2023-11-23 21:33:19,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1316. [2023-11-23 21:33:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 891 states have (on average 1.44668911335578) internal successors, (1289), 893 states have internal predecessors, (1289), 406 states have call successors, (406), 18 states have call predecessors, (406), 18 states have return successors, (406), 404 states have call predecessors, (406), 406 states have call successors, (406) [2023-11-23 21:33:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 2101 transitions. [2023-11-23 21:33:19,240 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 2101 transitions. Word has length 299 [2023-11-23 21:33:19,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:33:19,244 INFO L495 AbstractCegarLoop]: Abstraction has 1316 states and 2101 transitions. [2023-11-23 21:33:19,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 2 states have call successors, (71), 2 states have call predecessors, (71), 4 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-23 21:33:19,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 2101 transitions. [2023-11-23 21:33:19,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-11-23 21:33:19,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:33:19,252 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:33:19,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:33:19,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:33:19,475 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:33:19,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:33:19,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1968031506, now seen corresponding path program 1 times [2023-11-23 21:33:19,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:33:19,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989872353] [2023-11-23 21:33:19,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:33:19,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:33:19,535 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:33:19,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46316601] [2023-11-23 21:33:19,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:33:19,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:33:19,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:33:19,537 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:33:19,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:33:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:33:19,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:33:19,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:33:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2095 proven. 60 refuted. 0 times theorem prover too weak. 1985 trivial. 0 not checked. [2023-11-23 21:33:20,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:33:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 75 proven. 60 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2023-11-23 21:33:21,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:33:21,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989872353] [2023-11-23 21:33:21,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:33:21,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46316601] [2023-11-23 21:33:21,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46316601] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:33:21,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:33:21,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-23 21:33:21,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100779312] [2023-11-23 21:33:21,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:33:21,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:33:21,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:33:21,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:33:21,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:33:21,202 INFO L87 Difference]: Start difference. First operand 1316 states and 2101 transitions. Second operand has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 11 states have internal predecessors, (118), 4 states have call successors, (92), 3 states have call predecessors, (92), 5 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) [2023-11-23 21:33:22,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:33:22,336 INFO L93 Difference]: Finished difference Result 3552 states and 5592 transitions. [2023-11-23 21:33:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 21:33:22,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 11 states have internal predecessors, (118), 4 states have call successors, (92), 3 states have call predecessors, (92), 5 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) Word has length 299 [2023-11-23 21:33:22,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:33:22,358 INFO L225 Difference]: With dead ends: 3552 [2023-11-23 21:33:22,358 INFO L226 Difference]: Without dead ends: 2237 [2023-11-23 21:33:22,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 587 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:33:22,367 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 1073 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1098 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:33:22,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1098 Valid, 975 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:33:22,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2023-11-23 21:33:22,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2199. [2023-11-23 21:33:22,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 1470 states have (on average 1.4142857142857144) internal successors, (2079), 1472 states have internal predecessors, (2079), 682 states have call successors, (682), 46 states have call predecessors, (682), 46 states have return successors, (682), 680 states have call predecessors, (682), 682 states have call successors, (682) [2023-11-23 21:33:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 3443 transitions. [2023-11-23 21:33:22,832 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 3443 transitions. Word has length 299 [2023-11-23 21:33:22,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:33:22,833 INFO L495 AbstractCegarLoop]: Abstraction has 2199 states and 3443 transitions. [2023-11-23 21:33:22,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 11 states have internal predecessors, (118), 4 states have call successors, (92), 3 states have call predecessors, (92), 5 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) [2023-11-23 21:33:22,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 3443 transitions. [2023-11-23 21:33:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-11-23 21:33:22,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:33:22,841 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:33:22,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:33:23,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:33:23,057 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:33:23,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:33:23,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1713216295, now seen corresponding path program 1 times [2023-11-23 21:33:23,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:33:23,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650419436] [2023-11-23 21:33:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:33:23,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:33:23,119 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:33:23,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787807627] [2023-11-23 21:33:23,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:33:23,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:33:23,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:33:23,121 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:33:23,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:33:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:33:23,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 21:33:23,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:33:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2131 proven. 201 refuted. 0 times theorem prover too weak. 1808 trivial. 0 not checked. [2023-11-23 21:33:28,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:33:46,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:33:46,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650419436] [2023-11-23 21:33:46,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:33:46,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787807627] [2023-11-23 21:33:46,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787807627] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:33:46,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:33:46,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-23 21:33:46,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422048087] [2023-11-23 21:33:46,271 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 21:33:46,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:33:46,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:33:46,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:33:46,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=314, Unknown=6, NotChecked=0, Total=380 [2023-11-23 21:33:46,274 INFO L87 Difference]: Start difference. First operand 2199 states and 3443 transitions. Second operand has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 13 states have internal predecessors, (85), 3 states have call successors, (46), 3 states have call predecessors, (46), 5 states have return successors, (46), 3 states have call predecessors, (46), 3 states have call successors, (46) [2023-11-23 21:33:51,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:33:51,119 INFO L93 Difference]: Finished difference Result 4790 states and 7503 transitions. [2023-11-23 21:33:51,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 21:33:51,120 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 13 states have internal predecessors, (85), 3 states have call successors, (46), 3 states have call predecessors, (46), 5 states have return successors, (46), 3 states have call predecessors, (46), 3 states have call successors, (46) Word has length 300 [2023-11-23 21:33:51,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:33:51,143 INFO L225 Difference]: With dead ends: 4790 [2023-11-23 21:33:51,143 INFO L226 Difference]: Without dead ends: 2592 [2023-11-23 21:33:51,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=293, Invalid=1261, Unknown=6, NotChecked=0, Total=1560 [2023-11-23 21:33:51,154 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 707 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 100 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 1504 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:33:51,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 1504 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1365 Invalid, 34 Unknown, 0 Unchecked, 2.3s Time] [2023-11-23 21:33:51,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2023-11-23 21:33:51,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2335. [2023-11-23 21:33:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2335 states, 1555 states have (on average 1.409646302250804) internal successors, (2192), 1557 states have internal predecessors, (2192), 728 states have call successors, (728), 51 states have call predecessors, (728), 51 states have return successors, (728), 726 states have call predecessors, (728), 728 states have call successors, (728) [2023-11-23 21:33:51,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2335 states to 2335 states and 3648 transitions. [2023-11-23 21:33:51,549 INFO L78 Accepts]: Start accepts. Automaton has 2335 states and 3648 transitions. Word has length 300 [2023-11-23 21:33:51,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:33:51,550 INFO L495 AbstractCegarLoop]: Abstraction has 2335 states and 3648 transitions. [2023-11-23 21:33:51,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 13 states have internal predecessors, (85), 3 states have call successors, (46), 3 states have call predecessors, (46), 5 states have return successors, (46), 3 states have call predecessors, (46), 3 states have call successors, (46) [2023-11-23 21:33:51,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2335 states and 3648 transitions. [2023-11-23 21:33:51,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-11-23 21:33:51,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:33:51,557 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:33:51,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-23 21:33:51,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:33:51,765 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:33:51,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:33:51,766 INFO L85 PathProgramCache]: Analyzing trace with hash 341408997, now seen corresponding path program 1 times [2023-11-23 21:33:51,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:33:51,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398000866] [2023-11-23 21:33:51,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:33:51,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:33:51,821 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:33:51,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2879051] [2023-11-23 21:33:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:33:51,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:33:51,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:33:51,823 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:33:51,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da099569-cffc-4c2a-b8db-16138500e6aa/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process