./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-56.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-56.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya --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 de52c08fb0028bef519c22f81b06d40dd6144270e7f5fea59e5bb117b888da23 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:50:44,278 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:50:44,343 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:50:44,347 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:50:44,348 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:50:44,372 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:50:44,373 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:50:44,373 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:50:44,374 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:50:44,374 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:50:44,375 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:50:44,375 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:50:44,376 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:50:44,376 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:50:44,377 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:50:44,378 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:50:44,378 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:50:44,379 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:50:44,379 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:50:44,380 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:50:44,380 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:50:44,384 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:50:44,384 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:50:44,384 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:50:44,385 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:50:44,385 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:50:44,386 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:50:44,386 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:50:44,387 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:50:44,387 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:50:44,387 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:50:44,388 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:50:44,388 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:50:44,388 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:50:44,389 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:50:44,389 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:50:44,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:50:44,389 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:50:44,389 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:50:44,389 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:50:44,390 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:50:44,390 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:50:44,390 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_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de52c08fb0028bef519c22f81b06d40dd6144270e7f5fea59e5bb117b888da23 [2023-11-29 02:50:44,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:50:44,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:50:44,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:50:44,638 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:50:44,639 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:50:44,640 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-56.i [2023-11-29 02:50:47,399 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:50:47,617 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:50:47,617 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-56.i [2023-11-29 02:50:47,630 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/data/78ee20e16/c995b64eab6b4c839d5d8f341964ad79/FLAG9dd6fd3b0 [2023-11-29 02:50:47,645 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/data/78ee20e16/c995b64eab6b4c839d5d8f341964ad79 [2023-11-29 02:50:47,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:50:47,648 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:50:47,650 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:50:47,650 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:50:47,655 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:50:47,656 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:50:47" (1/1) ... [2023-11-29 02:50:47,657 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dddde4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:50:47, skipping insertion in model container [2023-11-29 02:50:47,657 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:50:47" (1/1) ... [2023-11-29 02:50:47,714 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:50:47,867 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_93e3e129-3559-483d-81f5-0d3a837a7786/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-56.i[916,929] [2023-11-29 02:50:47,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:50:48,011 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:50:48,023 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_93e3e129-3559-483d-81f5-0d3a837a7786/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-56.i[916,929] [2023-11-29 02:50:48,089 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:50:48,106 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:50:48,106 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:50:48 WrapperNode [2023-11-29 02:50:48,106 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:50:48,107 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:50:48,107 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:50:48,108 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:50:48,114 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:50:48" (1/1) ... [2023-11-29 02:50:48,133 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:50:48" (1/1) ... [2023-11-29 02:50:48,193 INFO L138 Inliner]: procedures = 26, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 366 [2023-11-29 02:50:48,193 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:50:48,194 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:50:48,194 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:50:48,194 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:50:48,206 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:50:48" (1/1) ... [2023-11-29 02:50:48,206 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:50:48" (1/1) ... [2023-11-29 02:50:48,214 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:50:48" (1/1) ... [2023-11-29 02:50:48,243 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]. [2023-11-29 02:50:48,243 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:50:48" (1/1) ... [2023-11-29 02:50:48,244 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:50:48" (1/1) ... [2023-11-29 02:50:48,259 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:50:48" (1/1) ... [2023-11-29 02:50:48,264 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:50:48" (1/1) ... [2023-11-29 02:50:48,270 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:50:48" (1/1) ... [2023-11-29 02:50:48,273 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:50:48" (1/1) ... [2023-11-29 02:50:48,280 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:50:48,281 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:50:48,281 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:50:48,281 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:50:48,282 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:50:48" (1/1) ... [2023-11-29 02:50:48,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:50:48,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:48,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:50:48,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:50:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:50:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 02:50:48,345 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 02:50:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:50:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:50:48,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:50:48,454 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:50:48,456 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:50:49,029 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:50:49,067 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:50:49,067 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 02:50:49,068 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:50:49 BoogieIcfgContainer [2023-11-29 02:50:49,068 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:50:49,070 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:50:49,070 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:50:49,073 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:50:49,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:50:47" (1/3) ... [2023-11-29 02:50:49,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a62c327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:50:49, skipping insertion in model container [2023-11-29 02:50:49,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:50:48" (2/3) ... [2023-11-29 02:50:49,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a62c327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:50:49, skipping insertion in model container [2023-11-29 02:50:49,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:50:49" (3/3) ... [2023-11-29 02:50:49,076 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-56.i [2023-11-29 02:50:49,090 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:50:49,090 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:50:49,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:50:49,141 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;@58ca2c93, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:50:49,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:50:49,146 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 96 states have (on average 1.5208333333333333) internal successors, (146), 97 states have internal predecessors, (146), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-29 02:50:49,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2023-11-29 02:50:49,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:50:49,168 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:49,169 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:50:49,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:49,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1832968246, now seen corresponding path program 1 times [2023-11-29 02:50:49,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:49,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779687201] [2023-11-29 02:50:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:49,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:49,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:49,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779687201] [2023-11-29 02:50:49,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 02:50:49,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114932740] [2023-11-29 02:50:49,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:49,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:49,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:49,429 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:50:49,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:50:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:49,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 02:50:49,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:50:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 4802 trivial. 0 not checked. [2023-11-29 02:50:49,806 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:50:49,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114932740] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:50:49,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:50:49,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:50:49,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742255127] [2023-11-29 02:50:49,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:50:49,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 02:50:49,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:49,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 02:50:49,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:50:49,843 INFO L87 Difference]: Start difference. First operand has 149 states, 96 states have (on average 1.5208333333333333) internal successors, (146), 97 states have internal predecessors, (146), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) Second operand has 2 states, 2 states have (on average 37.5) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 2 states have call successors, (50) [2023-11-29 02:50:49,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:50:49,903 INFO L93 Difference]: Finished difference Result 292 states and 534 transitions. [2023-11-29 02:50:49,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 02:50:49,906 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 37.5) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 2 states have call successors, (50) Word has length 320 [2023-11-29 02:50:49,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:50:49,915 INFO L225 Difference]: With dead ends: 292 [2023-11-29 02:50:49,915 INFO L226 Difference]: Without dead ends: 144 [2023-11-29 02:50:49,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:50:49,923 INFO L413 NwaCegarLoop]: 231 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, 231 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 [2023-11-29 02:50:49,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 231 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:50:49,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-29 02:50:49,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2023-11-29 02:50:49,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 92 states have (on average 1.4565217391304348) internal successors, (134), 92 states have internal predecessors, (134), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-29 02:50:49,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 234 transitions. [2023-11-29 02:50:49,978 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 234 transitions. Word has length 320 [2023-11-29 02:50:49,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:50:49,978 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 234 transitions. [2023-11-29 02:50:49,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.5) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 2 states have call successors, (50) [2023-11-29 02:50:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 234 transitions. [2023-11-29 02:50:49,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2023-11-29 02:50:49,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:50:49,987 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:49,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-29 02:50:50,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 02:50:50,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:50:50,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:50,189 INFO L85 PathProgramCache]: Analyzing trace with hash 573724598, now seen corresponding path program 1 times [2023-11-29 02:50:50,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:50,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694554218] [2023-11-29 02:50:50,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:50,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:50,276 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:50:50,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528011771] [2023-11-29 02:50:50,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:50,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:50,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:50,278 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:50:50,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:50:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:50,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:50:50,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:50:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-29 02:50:50,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:50:50,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:50,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694554218] [2023-11-29 02:50:50,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:50:50,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528011771] [2023-11-29 02:50:50,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528011771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:50:50,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:50:50,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:50:50,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880296816] [2023-11-29 02:50:50,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:50:50,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:50:50,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:50,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:50:50,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:50:50,661 INFO L87 Difference]: Start difference. First operand 144 states and 234 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-29 02:50:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:50:50,823 INFO L93 Difference]: Finished difference Result 424 states and 689 transitions. [2023-11-29 02:50:50,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:50:50,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 320 [2023-11-29 02:50:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:50:50,830 INFO L225 Difference]: With dead ends: 424 [2023-11-29 02:50:50,830 INFO L226 Difference]: Without dead ends: 281 [2023-11-29 02:50:50,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:50:50,833 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 213 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:50:50,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 605 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:50:50,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-11-29 02:50:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 183. [2023-11-29 02:50:50,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 131 states have (on average 1.5114503816793894) internal successors, (198), 131 states have internal predecessors, (198), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-29 02:50:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 298 transitions. [2023-11-29 02:50:50,870 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 298 transitions. Word has length 320 [2023-11-29 02:50:50,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:50:50,873 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 298 transitions. [2023-11-29 02:50:50,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-29 02:50:50,874 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 298 transitions. [2023-11-29 02:50:50,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2023-11-29 02:50:50,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:50:50,881 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:50,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:50:51,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:51,082 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:50:51,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:51,083 INFO L85 PathProgramCache]: Analyzing trace with hash -270280904, now seen corresponding path program 1 times [2023-11-29 02:50:51,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:51,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345605946] [2023-11-29 02:50:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:51,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:51,157 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:50:51,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495702758] [2023-11-29 02:50:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:51,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:51,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:51,159 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:50:51,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:50:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:51,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:50:51,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:50:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-29 02:50:51,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:50:51,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:51,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345605946] [2023-11-29 02:50:51,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:50:51,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495702758] [2023-11-29 02:50:51,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495702758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:50:51,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:50:51,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:50:51,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861234890] [2023-11-29 02:50:51,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:50:51,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:50:51,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:51,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:50:51,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:50:51,488 INFO L87 Difference]: Start difference. First operand 183 states and 298 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-29 02:50:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:50:51,579 INFO L93 Difference]: Finished difference Result 543 states and 884 transitions. [2023-11-29 02:50:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:50:51,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 320 [2023-11-29 02:50:51,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:50:51,586 INFO L225 Difference]: With dead ends: 543 [2023-11-29 02:50:51,586 INFO L226 Difference]: Without dead ends: 361 [2023-11-29 02:50:51,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:50:51,588 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 208 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:50:51,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 438 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:50:51,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2023-11-29 02:50:51,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 238. [2023-11-29 02:50:51,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 186 states have (on average 1.543010752688172) internal successors, (287), 186 states have internal predecessors, (287), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-29 02:50:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 387 transitions. [2023-11-29 02:50:51,619 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 387 transitions. Word has length 320 [2023-11-29 02:50:51,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:50:51,620 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 387 transitions. [2023-11-29 02:50:51,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-29 02:50:51,621 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 387 transitions. [2023-11-29 02:50:51,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2023-11-29 02:50:51,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:50:51,626 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:51,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 02:50:51,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 02:50:51,827 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:50:51,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:51,827 INFO L85 PathProgramCache]: Analyzing trace with hash -893329794, now seen corresponding path program 1 times [2023-11-29 02:50:51,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:51,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413603147] [2023-11-29 02:50:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:51,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:51,884 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:50:51,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672484214] [2023-11-29 02:50:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:51,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:51,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:51,886 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:50:51,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:50:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:52,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:50:52,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:50:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-29 02:50:52,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:50:52,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:52,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413603147] [2023-11-29 02:50:52,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:50:52,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672484214] [2023-11-29 02:50:52,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672484214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:50:52,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:50:52,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:50:52,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037176236] [2023-11-29 02:50:52,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:50:52,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:50:52,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:52,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:50:52,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:50:52,184 INFO L87 Difference]: Start difference. First operand 238 states and 387 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-29 02:50:52,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:50:52,487 INFO L93 Difference]: Finished difference Result 573 states and 925 transitions. [2023-11-29 02:50:52,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:50:52,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 321 [2023-11-29 02:50:52,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:50:52,492 INFO L225 Difference]: With dead ends: 573 [2023-11-29 02:50:52,492 INFO L226 Difference]: Without dead ends: 336 [2023-11-29 02:50:52,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:50:52,494 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 288 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:50:52,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 489 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:50:52,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-11-29 02:50:52,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 238. [2023-11-29 02:50:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 186 states have (on average 1.5161290322580645) internal successors, (282), 186 states have internal predecessors, (282), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-29 02:50:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 382 transitions. [2023-11-29 02:50:52,518 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 382 transitions. Word has length 321 [2023-11-29 02:50:52,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:50:52,519 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 382 transitions. [2023-11-29 02:50:52,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-29 02:50:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 382 transitions. [2023-11-29 02:50:52,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2023-11-29 02:50:52,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:50:52,523 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:52,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:50:52,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:52,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:50:52,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:52,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1157654204, now seen corresponding path program 1 times [2023-11-29 02:50:52,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:52,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961665004] [2023-11-29 02:50:52,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:52,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:52,793 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:50:52,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225250005] [2023-11-29 02:50:52,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:52,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:52,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:52,795 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:50:52,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:50:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:53,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:50:53,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:50:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 693 proven. 9 refuted. 0 times theorem prover too weak. 4198 trivial. 0 not checked. [2023-11-29 02:50:53,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:50:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 138 proven. 9 refuted. 0 times theorem prover too weak. 4753 trivial. 0 not checked. [2023-11-29 02:50:53,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:53,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961665004] [2023-11-29 02:50:53,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:50:53,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225250005] [2023-11-29 02:50:53,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225250005] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:50:53,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:50:53,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 02:50:53,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812262286] [2023-11-29 02:50:53,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:50:53,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:50:53,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:53,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:50:53,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:50:53,369 INFO L87 Difference]: Start difference. First operand 238 states and 382 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2023-11-29 02:50:53,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:50:53,706 INFO L93 Difference]: Finished difference Result 479 states and 766 transitions. [2023-11-29 02:50:53,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:50:53,707 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) Word has length 321 [2023-11-29 02:50:53,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:50:53,710 INFO L225 Difference]: With dead ends: 479 [2023-11-29 02:50:53,710 INFO L226 Difference]: Without dead ends: 242 [2023-11-29 02:50:53,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 634 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:50:53,712 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 173 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:50:53,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 423 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:50:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-11-29 02:50:53,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2023-11-29 02:50:53,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 189 states have (on average 1.5026455026455026) internal successors, (284), 189 states have internal predecessors, (284), 50 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-29 02:50:53,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 384 transitions. [2023-11-29 02:50:53,733 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 384 transitions. Word has length 321 [2023-11-29 02:50:53,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:50:53,734 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 384 transitions. [2023-11-29 02:50:53,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2023-11-29 02:50:53,734 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 384 transitions. [2023-11-29 02:50:53,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2023-11-29 02:50:53,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:50:53,737 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:53,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:50:53,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:53,944 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:50:53,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:53,944 INFO L85 PathProgramCache]: Analyzing trace with hash 498122682, now seen corresponding path program 1 times [2023-11-29 02:50:53,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:53,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558303521] [2023-11-29 02:50:53,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:53,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:54,014 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:50:54,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070697908] [2023-11-29 02:50:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:54,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:54,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:54,016 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:50:54,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:50:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:54,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 02:50:54,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:50:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 337 proven. 3 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2023-11-29 02:50:54,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:50:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-29 02:50:54,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:54,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558303521] [2023-11-29 02:50:54,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:50:54,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070697908] [2023-11-29 02:50:54,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070697908] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:50:54,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:50:54,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-11-29 02:50:54,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326169777] [2023-11-29 02:50:54,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:50:54,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:50:54,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:54,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:50:54,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:50:54,719 INFO L87 Difference]: Start difference. First operand 242 states and 384 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-29 02:50:55,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:50:55,151 INFO L93 Difference]: Finished difference Result 622 states and 970 transitions. [2023-11-29 02:50:55,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:50:55,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 321 [2023-11-29 02:50:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:50:55,155 INFO L225 Difference]: With dead ends: 622 [2023-11-29 02:50:55,155 INFO L226 Difference]: Without dead ends: 381 [2023-11-29 02:50:55,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 631 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:50:55,157 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 401 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:50:55,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 1558 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:50:55,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-11-29 02:50:55,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 175. [2023-11-29 02:50:55,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 122 states have (on average 1.360655737704918) internal successors, (166), 122 states have internal predecessors, (166), 50 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-29 02:50:55,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 266 transitions. [2023-11-29 02:50:55,200 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 266 transitions. Word has length 321 [2023-11-29 02:50:55,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:50:55,201 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 266 transitions. [2023-11-29 02:50:55,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-29 02:50:55,202 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 266 transitions. [2023-11-29 02:50:55,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2023-11-29 02:50:55,205 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:50:55,205 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:55,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 02:50:55,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:55,407 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:50:55,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:55,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1270651975, now seen corresponding path program 1 times [2023-11-29 02:50:55,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:55,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113959206] [2023-11-29 02:50:55,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:55,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:55,463 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:50:55,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138615710] [2023-11-29 02:50:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:55,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:55,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:55,465 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:50:55,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:50:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:55,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 02:50:55,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:50:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 3340 proven. 249 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2023-11-29 02:50:57,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:50:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 303 proven. 267 refuted. 0 times theorem prover too weak. 4330 trivial. 0 not checked. [2023-11-29 02:50:58,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:58,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113959206] [2023-11-29 02:50:58,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:50:58,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138615710] [2023-11-29 02:50:58,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138615710] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:50:58,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:50:58,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-11-29 02:50:58,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479792081] [2023-11-29 02:50:58,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:50:58,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 02:50:58,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:58,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 02:50:58,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:50:58,241 INFO L87 Difference]: Start difference. First operand 175 states and 266 transitions. Second operand has 26 states, 25 states have (on average 6.0) internal successors, (150), 24 states have internal predecessors, (150), 9 states have call successors, (79), 5 states have call predecessors, (79), 12 states have return successors, (80), 9 states have call predecessors, (80), 9 states have call successors, (80) [2023-11-29 02:50:59,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:50:59,370 INFO L93 Difference]: Finished difference Result 367 states and 545 transitions. [2023-11-29 02:50:59,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 02:50:59,371 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 6.0) internal successors, (150), 24 states have internal predecessors, (150), 9 states have call successors, (79), 5 states have call predecessors, (79), 12 states have return successors, (80), 9 states have call predecessors, (80), 9 states have call successors, (80) Word has length 322 [2023-11-29 02:50:59,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:50:59,373 INFO L225 Difference]: With dead ends: 367 [2023-11-29 02:50:59,373 INFO L226 Difference]: Without dead ends: 193 [2023-11-29 02:50:59,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=486, Invalid=996, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 02:50:59,376 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 710 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:50:59,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 555 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:50:59,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-11-29 02:50:59,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2023-11-29 02:50:59,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 134 states have (on average 1.2835820895522387) internal successors, (172), 134 states have internal predecessors, (172), 50 states have call successors, (50), 6 states have call predecessors, (50), 6 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-29 02:50:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 272 transitions. [2023-11-29 02:50:59,394 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 272 transitions. Word has length 322 [2023-11-29 02:50:59,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:50:59,395 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 272 transitions. [2023-11-29 02:50:59,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 6.0) internal successors, (150), 24 states have internal predecessors, (150), 9 states have call successors, (79), 5 states have call predecessors, (79), 12 states have return successors, (80), 9 states have call predecessors, (80), 9 states have call successors, (80) [2023-11-29 02:50:59,395 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 272 transitions. [2023-11-29 02:50:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2023-11-29 02:50:59,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:50:59,399 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:59,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:50:59,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:59,600 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:50:59,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:59,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1024570641, now seen corresponding path program 1 times [2023-11-29 02:50:59,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:59,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551688684] [2023-11-29 02:50:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:59,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:59,651 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:50:59,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964601078] [2023-11-29 02:50:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:59,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:59,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:59,653 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:50:59,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:50:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:59,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:50:59,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:51:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1017 proven. 15 refuted. 0 times theorem prover too weak. 3868 trivial. 0 not checked. [2023-11-29 02:51:00,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:51:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 132 proven. 15 refuted. 0 times theorem prover too weak. 4753 trivial. 0 not checked. [2023-11-29 02:51:01,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:51:01,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551688684] [2023-11-29 02:51:01,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:51:01,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964601078] [2023-11-29 02:51:01,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964601078] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:51:01,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:51:01,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2023-11-29 02:51:01,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499635658] [2023-11-29 02:51:01,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:51:01,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 02:51:01,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:51:01,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 02:51:01,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:51:01,006 INFO L87 Difference]: Start difference. First operand 191 states and 272 transitions. Second operand has 19 states, 19 states have (on average 6.894736842105263) internal successors, (131), 19 states have internal predecessors, (131), 4 states have call successors, (100), 3 states have call predecessors, (100), 5 states have return successors, (100), 4 states have call predecessors, (100), 4 states have call successors, (100) [2023-11-29 02:51:03,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:51:03,421 INFO L93 Difference]: Finished difference Result 898 states and 1256 transitions. [2023-11-29 02:51:03,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 02:51:03,422 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.894736842105263) internal successors, (131), 19 states have internal predecessors, (131), 4 states have call successors, (100), 3 states have call predecessors, (100), 5 states have return successors, (100), 4 states have call predecessors, (100), 4 states have call successors, (100) Word has length 323 [2023-11-29 02:51:03,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:51:03,428 INFO L225 Difference]: With dead ends: 898 [2023-11-29 02:51:03,428 INFO L226 Difference]: Without dead ends: 708 [2023-11-29 02:51:03,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 634 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=416, Invalid=1390, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 02:51:03,431 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 1968 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 1891 mSolverCounterSat, 1135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1970 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 3026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1135 IncrementalHoareTripleChecker+Valid, 1891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:51:03,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1970 Valid, 1489 Invalid, 3026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1135 Valid, 1891 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 02:51:03,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2023-11-29 02:51:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 437. [2023-11-29 02:51:03,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 265 states have (on average 1.1773584905660377) internal successors, (312), 266 states have internal predecessors, (312), 150 states have call successors, (150), 21 states have call predecessors, (150), 21 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2023-11-29 02:51:03,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 612 transitions. [2023-11-29 02:51:03,520 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 612 transitions. Word has length 323 [2023-11-29 02:51:03,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:51:03,521 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 612 transitions. [2023-11-29 02:51:03,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.894736842105263) internal successors, (131), 19 states have internal predecessors, (131), 4 states have call successors, (100), 3 states have call predecessors, (100), 5 states have return successors, (100), 4 states have call predecessors, (100), 4 states have call successors, (100) [2023-11-29 02:51:03,522 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 612 transitions. [2023-11-29 02:51:03,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2023-11-29 02:51:03,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:51:03,524 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:51:03,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 02:51:03,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:51:03,732 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:51:03,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:51:03,732 INFO L85 PathProgramCache]: Analyzing trace with hash 2066721924, now seen corresponding path program 1 times [2023-11-29 02:51:03,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:51:03,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076581081] [2023-11-29 02:51:03,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:51:03,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:51:03,788 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:51:03,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452453466] [2023-11-29 02:51:03,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:51:03,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:51:03,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:51:03,789 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:51:03,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:51:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:04,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:51:04,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:51:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 3302 proven. 177 refuted. 0 times theorem prover too weak. 1421 trivial. 0 not checked. [2023-11-29 02:51:05,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:51:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-29 02:51:05,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:51:05,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076581081] [2023-11-29 02:51:05,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:51:05,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452453466] [2023-11-29 02:51:05,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452453466] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:51:05,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:51:05,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-11-29 02:51:05,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000247697] [2023-11-29 02:51:05,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:51:05,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:51:05,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:51:05,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:51:05,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:51:05,509 INFO L87 Difference]: Start difference. First operand 437 states and 612 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-29 02:51:09,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:51:10,589 INFO L93 Difference]: Finished difference Result 1116 states and 1562 transitions. [2023-11-29 02:51:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:51:10,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 323 [2023-11-29 02:51:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:51:10,597 INFO L225 Difference]: With dead ends: 1116 [2023-11-29 02:51:10,597 INFO L226 Difference]: Without dead ends: 791 [2023-11-29 02:51:10,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 631 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:51:10,598 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 257 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:51:10,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 545 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2023-11-29 02:51:10,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2023-11-29 02:51:10,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 469. [2023-11-29 02:51:10,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 297 states have (on average 1.1986531986531987) internal successors, (356), 298 states have internal predecessors, (356), 150 states have call successors, (150), 21 states have call predecessors, (150), 21 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2023-11-29 02:51:10,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 656 transitions. [2023-11-29 02:51:10,690 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 656 transitions. Word has length 323 [2023-11-29 02:51:10,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:51:10,690 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 656 transitions. [2023-11-29 02:51:10,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-29 02:51:10,691 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 656 transitions. [2023-11-29 02:51:10,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-11-29 02:51:10,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:51:10,692 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:51:10,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 02:51:10,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:51:10,893 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:51:10,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:51:10,894 INFO L85 PathProgramCache]: Analyzing trace with hash 2018461449, now seen corresponding path program 1 times [2023-11-29 02:51:10,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:51:10,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572356694] [2023-11-29 02:51:10,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:51:10,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:51:10,930 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:51:10,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992667636] [2023-11-29 02:51:10,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:51:10,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:51:10,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:51:10,931 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:51:10,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:51:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:11,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 02:51:11,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:51:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 3493 proven. 435 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2023-11-29 02:51:13,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:51:24,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:51:24,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572356694] [2023-11-29 02:51:24,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:51:24,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992667636] [2023-11-29 02:51:24,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992667636] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:51:24,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:51:24,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-11-29 02:51:24,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291162664] [2023-11-29 02:51:24,974 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:51:24,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:51:24,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:51:24,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:51:24,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=662, Unknown=1, NotChecked=0, Total=812 [2023-11-29 02:51:24,976 INFO L87 Difference]: Start difference. First operand 469 states and 656 transitions. Second operand has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 22 states have internal predecessors, (107), 7 states have call successors, (50), 7 states have call predecessors, (50), 11 states have return successors, (50), 7 states have call predecessors, (50), 7 states have call successors, (50) [2023-11-29 02:51:30,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:34,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:38,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:42,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:46,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:50,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:54,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:51:58,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:52:02,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:52:06,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:52:10,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:52:14,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:52:18,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:52:21,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:52:21,235 INFO L93 Difference]: Finished difference Result 1422 states and 1907 transitions. [2023-11-29 02:52:21,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-29 02:52:21,236 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 22 states have internal predecessors, (107), 7 states have call successors, (50), 7 states have call predecessors, (50), 11 states have return successors, (50), 7 states have call predecessors, (50), 7 states have call successors, (50) Word has length 324 [2023-11-29 02:52:21,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:52:21,243 INFO L225 Difference]: With dead ends: 1422 [2023-11-29 02:52:21,244 INFO L226 Difference]: Without dead ends: 1065 [2023-11-29 02:52:21,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=940, Invalid=3481, Unknown=1, NotChecked=0, Total=4422 [2023-11-29 02:52:21,248 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 694 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 351 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 2135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:52:21,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 1491 Invalid, 2135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 1771 Invalid, 13 Unknown, 0 Unchecked, 54.2s Time] [2023-11-29 02:52:21,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2023-11-29 02:52:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1059. [2023-11-29 02:52:21,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 706 states have (on average 1.179886685552408) internal successors, (833), 709 states have internal predecessors, (833), 282 states have call successors, (282), 70 states have call predecessors, (282), 70 states have return successors, (282), 279 states have call predecessors, (282), 282 states have call successors, (282) [2023-11-29 02:52:21,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1397 transitions. [2023-11-29 02:52:21,487 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1397 transitions. Word has length 324 [2023-11-29 02:52:21,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:52:21,488 INFO L495 AbstractCegarLoop]: Abstraction has 1059 states and 1397 transitions. [2023-11-29 02:52:21,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 22 states have internal predecessors, (107), 7 states have call successors, (50), 7 states have call predecessors, (50), 11 states have return successors, (50), 7 states have call predecessors, (50), 7 states have call successors, (50) [2023-11-29 02:52:21,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1397 transitions. [2023-11-29 02:52:21,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-11-29 02:52:21,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:52:21,490 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:52:21,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:52:21,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 02:52:21,691 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:52:21,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:52:21,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1005810644, now seen corresponding path program 1 times [2023-11-29 02:52:21,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:52:21,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090733543] [2023-11-29 02:52:21,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:21,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:52:21,729 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:52:21,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502532056] [2023-11-29 02:52:21,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:21,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:21,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:52:21,731 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:52:21,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:52:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:24,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 02:52:24,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:52:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1239 proven. 126 refuted. 0 times theorem prover too weak. 3535 trivial. 0 not checked. [2023-11-29 02:52:25,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:52:25,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:52:25,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090733543] [2023-11-29 02:52:25,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:52:25,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502532056] [2023-11-29 02:52:25,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502532056] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:52:25,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:52:25,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-29 02:52:25,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229302869] [2023-11-29 02:52:25,939 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:52:25,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:52:25,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:52:25,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:52:25,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:52:25,941 INFO L87 Difference]: Start difference. First operand 1059 states and 1397 transitions. Second operand has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 8 states have internal predecessors, (83), 2 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2023-11-29 02:52:26,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:52:26,759 INFO L93 Difference]: Finished difference Result 2332 states and 3084 transitions. [2023-11-29 02:52:26,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 02:52:26,761 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 8 states have internal predecessors, (83), 2 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 324 [2023-11-29 02:52:26,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:52:26,770 INFO L225 Difference]: With dead ends: 2332 [2023-11-29 02:52:26,770 INFO L226 Difference]: Without dead ends: 1409 [2023-11-29 02:52:26,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:52:26,775 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 386 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:52:26,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 1119 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:52:26,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2023-11-29 02:52:27,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1253. [2023-11-29 02:52:27,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 881 states have (on average 1.1963677639046537) internal successors, (1054), 886 states have internal predecessors, (1054), 297 states have call successors, (297), 74 states have call predecessors, (297), 74 states have return successors, (297), 292 states have call predecessors, (297), 297 states have call successors, (297) [2023-11-29 02:52:27,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1648 transitions. [2023-11-29 02:52:27,054 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1648 transitions. Word has length 324 [2023-11-29 02:52:27,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:52:27,055 INFO L495 AbstractCegarLoop]: Abstraction has 1253 states and 1648 transitions. [2023-11-29 02:52:27,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 8 states have internal predecessors, (83), 2 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2023-11-29 02:52:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1648 transitions. [2023-11-29 02:52:27,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-11-29 02:52:27,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:52:27,059 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:52:27,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 02:52:27,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 02:52:27,260 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:52:27,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:52:27,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1903203922, now seen corresponding path program 1 times [2023-11-29 02:52:27,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:52:27,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325286150] [2023-11-29 02:52:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:27,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:52:27,307 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:52:27,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232824151] [2023-11-29 02:52:27,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:27,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:27,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:52:27,309 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:52:27,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e3e129-3559-483d-81f5-0d3a837a7786/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process